2002
Edited by: John M. Steinberg
With Contributions by Hans Barnard, Doug Bolender, Tara Carter, Nilka Dabare, Brian Damiata, Bob Daniels, Joyce Daniels, Katrín Gunnarsdóttir, Grétar M Guðbergsson, Steve Martin, Magnús Á. Sigurgeirsson, Sigríður Sigurðardóttir
Additional 2001 participants James Alexakis, Liz DeMarrais, Charlotte Dugdale, Tim Earle, Antonio Gilman, Minna Haapanen, Illana Johnson, Anna Noah, Syd Self & Ken Stuart
Additoinal 2002 participants Jeannette Bond, E. Paul Durrenberger, Vala Garðarsdóttir, Linda Rehberger, Paul Song, Elisabeth I Ward,
Funded by
United States National Science Foundation Wenner-Gren Foundation for Anthropological Research
With the instutional assistance of
Hólaskóli Byggðasafn Skagfirðinga Glaumbæ
Permit issued by Kristín Huld Sigurðardótti, Forstöðumaður Fornleifaverndar ríkisins
Under the guidance of Þór Hjaltalín, Þjóðminjasafn Íslands Ragnheiður Traustadóttir, Þjóðminjasafn Íslands Gudny Zoega, Þjóðminjasafn Íslands
Additional copies of this report and other reports, as well as much of the raw data can be downloaded from http://sass.ioa.ucla.edu
This an interim report on the majority of the activities of the Skagafjör›ur Archaeological Settlement Survey (SASS) during the summer of 2002. As it is an interim report, it is incomplete and unpolished. This report has several substantial and important omissions. It covers much of the remote sensing and follow-up excavations. It also outlines the results of our work on organic content of turf walls. Finally, it includes our prelimary interperation of the settlement pattern. There is no bibliography, or acknowledgments. The work of Doug Bolender (soil phosphate), Tara Carter (soil deposition) and Bob Daniels (Surface Survey) are not included.
Because of the written sagas, Viking Age and Late Norse Iceland (874-1300 AD) is one of the best case studies for understanding the social structure of chiefdoms. The sagas are ambiguous as to what kind of settlement pattern might have existed and how it changed over time. According to the most interpretations of the saga descriptions of Commonwealth Iceland, the society had no formal system of elite finance. Chiefs did not receive any payment unless they performed a service and farmers could choose any chief, within their quarter, to give allegiance. While sagas single out some farmers and chieftains being wealthy and powerful, what that wealth or power was, where it came from, or how it was maintained is not clear. Much of the wealth must have been derived from the land and farm production, but how wealth was centralized has been subject to much debate (e.g., Byock 2001; Durrenberger 1988; Vésteinsson 2000; McGovern, et al. 1988; Þorláksson 1992).
It is not clear if the differential wealth and power of farmers and chiefdoms is reflected in a two-tier settlement hierarchy. In chiefly societies based on semi-functional mechanisms, central places in redistribution networks often become larger than other settlement sites creating distinct settlement hierarchies (Peebles and Kus 1977; Service 1975). The settlement pattern may be, as Gilman (1995) proposes for Germanic societies, based on exploitation rather than production and therefore a settlement hierarchy should not be apparent until long after social stratification has been institutionalized. Unbiased settlement pattern results should help us begin to clarify the distribution of wealth and power across Viking Age Iceland and how it changed as the society became more complex. That is, how did the settlement configuration change as Iceland experienced the growth of regional power, the institution of taxes and rents, and was finally the incorporated into the Scandinavia monarchical system?
Archaeological Survey in Iceland has advanced substantially since 1879 when members of the Icelandic Archaeological Society first organized reconnaissance to locate sites related to the Saga literature (Friðriksson 1994:8). Archaeological survey now comprises a well-developed series of procedures and methods for the identification and assessment of archaeological sites based on documentary review, informant interviews, and field walking to identify visible remains (e.g., Friðriksson and Vésteinsson 1998; Ólafsson 1996, 1999; Sveinbjarnardóttir 1992; Traustadóttir 2000). The results of archaeological survey provide basic tools for both research into and cultural heritage management of, the important and fragile archaeological resources of Iceland. However, a whole series of environmental conditions bias the results of archaeological survey to such an extent that survey results may be too incomplete for settlement pattern analyses.
Archaeological survey can provide broad estimates of basic socio-economic parameters of past societies. The results of archaeological survey are usually presented as settlement patterns, which plot the location, size, and date of settlements across the landscape and show the relationship of settlement to the distribution of critical resources. The control of land and resources is a central part of the creation, maintenance, and change of social power (e.g., Childe 1958; Earle 1991; Finley 1973; Malinowski 1935; Mann 1986). Critical resources are claimed and owned by establishing property rights (the ability to exploit and the ability to exclude - Demsetz 1967; Hunt and Gilman 1998; Munzer 1990). Property rights over resources are often established by living near them. Not surprisingly, settlement patterns are sensitive to changes in the distribution of social power (e.g., Billman and Feinman 1999; Parsons 1972; Vogt and Leventhal 1983; Willey 1953).
Settlement patterns are spatially ordered systems of land use that represent the way groups used the landscape (Hester, Shafer and Feder 1997). The analysis of settlement patterns comprises a suite of techniques, such as site catchment (the distribution of resources in relation to sites), territories (the area in between sites), and central place studies (the distribution of large and small sites). Information about the relative size and occupation dates of individual sites allows patterns to be seen that reveal political dynamics which are especially apparent in comparative contexts. Results of these studies can be fruitfully contrasted between regions and between time periods to understand how critical resources are created or controlled. We present below a first step towards gathering the data necessary to carry out various settlement pattern analyses in Iceland.
Smith and Parsons (1989) have identified the specific problems, as well as the advantages, of archaeological survey in Iceland. They note a series of significant biases that make settlement pattern analysis in Iceland challenging. There are few surface artifacts and no native pottery. Therefore, site identification primarily depends on the surface preservation of architectural remains and dating sites usually requires excavation. There has also been extensive land modification (e.g., mudslides, flooding, land leveling, soil erosion and aeolian soil deposition). Finally, early Icelandic settlements are small, dispersed, and easy to overlook.
The preservation and visibility of sites varies by region so that in different areas the likelihood of discovering archaeological remains varies. In areas with little aeolian soil deposition or modern land alteration, old ruins may be clearly visible on the surface. In the highly productive lowland areas much of the past landscape has been buried and surface remains have been erased by modern farming activity such as plowing and field leveling. Where the probability of site discovery varies systematically, as likely in Iceland, then the resulting settlement pattern analyses can be fundamentally skewed (Colins 1975; Schiffer, Sullivan and Klinger 1978). In Iceland, because soil deposition and farm abandonment vary systematically with elevation and region (Dugmore and Buckland 1991; Guðbergsson 1996; Johannesson 1960), preservation and site discovery probabilities are probably systematically biased as well.
Because the conditions for surface survey in Greenland present fewer biases, researchers have conducted several Norse settlement pattern studies there (e.g., Berglund 1990; Christensen 1990; McGovern 1983, 1992). The results suggest that there is a general correlation between settlement density and fertility. The exception, a lower than expected settlement density around around the bishopʼs farm, suggests a minor settlement hierarchy (Keller 1990). Several proposals for specific settlement pattern sequences have been suggested for Iceland (e.g., Durrenberger 1988, 1989, 1992; Herschend 1994; Vésteinsson 1998, 2000; Smith 1995: Þorláksson 1992) but the factors detailed by Smith and Parsons (1989) have hindered the gathering of archaeological data that would allow for a critical evaluation of these proposals.
The primary goal of the Skagafjörður Archaeological Settlement Survey (SASS) is to address these survey biases with the addition of intensive sub-surface remote sensing to survey protocols in an attempt to make settlement pattern analysis more reliable and productive. Commonwealth settlement patterns are essential for understanding early Icelandic social structure and could provide an important comparison with other chiefly societies without such extensive written records. The project has developed a protocol of coring, remote sensing, and test excavation that, while slow, substantially reduces survey biases. While we have only intensively surveyed a very small region of Skagafjörður (Figure 1), the results are suggestive of significant changes in household organization and property in the first 200 years following the settlement. The settlement pattern results suggest that from the settlement in 874 AD until 1000, large farms were widely dispersed across the landscape with little hierarchy among sites. Between 1000 and 1100 AD, small farms were established around the pre-existing larger farms resulting in a two-tiered settlement hierarchy. Finally, in about 1100 AD the large farms shift to new locations, were they remained until the 20th century. One the result of this pattern is that many of the original Viking Age occupations are currently under modern homefields where they are at substantial risk from farming activity. Overall, we find that it is essential for both research and cultural heritage management

Figure 1: Map of Skagafjörður, showing land claims, based on Landnámabók. Chiefly land claims are highlighted in Black. The Langholt region (Figure 4) is boxed in white
to produce unbiased settlement patterns and we have found that sub-surface survey must be a large component of such reconnaissance.
The main targets of survey in Iceland are the remains of turf structures. This is true for both regular pedestrian and sub-surface survey. In pedestrian survey, remains are identified and mapped where they are preserved above the surface. In subsurface survey, the buried turf remains must be distinguished from the surrounding soil based on their geophysical properties.
Skagafjörður has good conditions for the preservation of turf architecture. Turf is the root mass cut from the upper portion of a peat bog and once dried, the material is a light, flexible, and durable building material with good insulation properties (see contributions to Myhre, Stoklund and Gjærder 1982; Urbanczyk 1999). Once a turf house is abandoned, the strips and blocks of turf erode and fall in various directions, usually only leaving the bottom of the wall intact, but surrounded by a substantial area of turf fall. Probably because of relatively dry and mild weather, lowland Skagafjörður has a remarkable number standing turf structures in various states of decay (Sigurðardóttir 2002). It is likely that in the coastal and fjord areas of Skagafjörður, turf structures abandoned during the Viking Age would have been buried rapidly, preventing their destruction by the wind and weather. Soil deposition studies (Guðbergsson 1975, 1994) indicate that most of the 30 to 90 cm of aeolian soil that has accumulated in lowland Skagafjörður over the last 1100 years from eroding highland areas, was deposited during the first 250 years of settlement (from 874-1100 AD, see also Thorarinsson 1961). The rapid burial of lowland areas means there could be a substantial number of early structures preserved under the present landscape.
However, good conditions for preservation of turf structures do not necessarily imply that the identification of the early sites with substantial turf architecture is unbiased. Once buried, the small air pockets in turf that make up most of its volume, are compressed, substantially reducing the volume. The combination of the reduction in turf volume and the deposition of substantial aeolian soils means that well-preserved compressed turf structures can be completely buried, with little sign of their existence on the ground surface. In some cases, community memory and other documents are accurate enough to locate buried structures, even without surface signs as a guide. In other cases, turf structures have been rebuilt on the same location, century after century, creating farm mounds which mark the location of earlier structures (Snæsdóttir 1990). Lowland Skagafjörður has excellent conditions for the preservation of the early landscape and the number of sites preserved may well be close to the number of sites that existed. We could take advantage of this excellent preservation for settlement pattern research, if the the majority of sites could be identified.
Starting in 1998, first in Mosfelsdalur and then in Skagafjörður, we began to develop a protocol for identifying buried sites, away from farm mounds, in lowland areas that have received substantial soil deposition. We believed that the most important parameter to evaluate, in preparation for settlement pattern analysis, was the likelihood of preserved habitation sites and farmsteads that were neither visible on the surface nor specifically recorded in documents or community memory.
Identifying sites not apparent on the surface has been a preoccupation of archaeologists around the world. In general, besides intuition, there has been three basic approaches to sub-surface survey: shovel test pits, chemical analysis, and remote sensing (e.g., Ammerman 1981; Eidt 1973; Kvamme 2003; Nunez 1990; Read 1986; Schiffer, Sullivan and Klinger 1978; Wood and Johnson 1978; Weymouth 1986; Weymouth and Woods 1984). Like many surveys, we have combined them and, with the addition of standard surface survey, hope to have produced a protocol that systematically identifies both visible and buried archaeological sites throughout an entire region.
After a modern farm was selected for examination, a traditional document survey was carried out that included pedestrian survey, where structures and farm mounds mentioned in various sources were associated with distinct features in the landscape. Farm mounds, or other visible structures on the surface were mapped and their GPS coordinates recorded. If the visible structures appeared to have any depth to them, cores were taken to identify midden areas—which seem to have the best conditions for volcanic ash preservation. If a midden was present, a 1 x 1 m test trench was excavated down to prehistoric soil in the area of richest and deepest ash deposit to determine occupation span.
At the same time, targeted soil cores were taken around the fields of the farm to ascertain soil depth. For this initial subsurface survey, we used Eijkelkamp single gouge augers at 50 meter intervals. This program also identified drained wetlands, areas where remains should be visible (e.g., regions that have had little soil deposition or substantial erosion), and areas that have been substantially altered by earthmoving. Where conditions indicated that structures could be preserved we cored every 25 meters using Oakfield peat samplers, which produce better preserved soil cores, to record tephra layers (Table 1), stratigraphic sequences, and take soil samples for environmental reconstructions and phosphate levels. Cultural material identified in soil cores – such as charcoal, peat ash, and burn bone fragments – were found often to predict the presence of early structures.
Areas that had received at least 30 centimeters of soil over the last 1100 years, with good stratigraphic preservation, and were without modern electrical contamination (for example, buried iron structures, pipes, power lines, telephone cables, etc.) were then selected for conductivity survey with the EM-31. The EM-31 is usually carried at hip-level and can record apparent ground conductivity readings while the operator walks over the surface. The transmitter and receiver coils are separated by 4 meters. The transmitter coil emits an alternating current that induces a secondary magnetic field, the strength of which is an indication of the overall apparent ground conductivity. The instrument has an effective penetration depth of 6 meters with most of the apparent ground conductivity reading coming from 1.5 meters below the surface. We have found that the horizontal resolution can be as small as 50 cm.
Turf walls, even when buried and compressed, seem to resist electrical currents more than the surrounding environment. This is probably due to lower clay content in turf, which still has a high organic content compared to the surrounding soil matrix. Therefore, turf walls can be identified with the EM-31 as linear low conductivity anomalies (for example see Figure 2: EM-31 UTM North 7277570).
There are many other surface and subsurface conditions that will create linear low conductivity readings, not just buried turf walls. Therefore, any reading that could be a turf wall was investigated with a power auger, which excavates an 8 inch bore hole — just large enough to reliably identify turf walls and midden deposits. The small, but deep auger holes minimize disruption of the electrical properties of the
Table 1: Tephra Layers in Skagafjörður
| Date (AD) | Tephra | Thickness | Color | Social event |
|---|---|---|---|---|
| 871 ±2 | Landnám | >0.5 cm | Green | Settlement |
| 1000 | Veiðivötn-Dyngjuháls | 0.5 cm | Blue | Conversion |
| 1104 | Hekla 1 | 1 cm | Yellow | Tithe |
| 1300 | Hekla | >1 cm | Gray-Blue | Little Ice Age |
| 1766 | Hekla | >0.5 cm | Black |
soil.
Keeping soil disturbance to a minimum is important because when a turf wall was identified we used the Syscal Kid resistivity meter, which provided a more detailed assessment of the sub-surface. Each of the Syscal Kidʼs 24 metal stakes must be in good contact with the ground. The instrument then measures the electrical resistance between all of the stakes, two at a time. Rather than one reading at a single spot, like the EM-31, the Syscal Kid provided several readings at different depths on the same spot, which can be interpolated to create a pseudo-profile of the subsurface. Several profiles can be combined to get a good idea of the wall or building orientation (Figure 3).
Finally, several test trenches were excavated into, what was anticipated to be the outside walls of the identified structure. Not only do the test-trenches provide critical ground truthing to the remote sensing readings, they provide necessary material for dating the site.
Remote sensing is time consuming and consequentially only a small portion of any farm can reasonably be targeted for survey. The protocol is designed to evaluate the entire landscape by eliminating areas where sub-surface preservation is unlikely and identify ever smaller areas for more intensive exploration. A three person coring team can cover 3 to 10 hectares in a day (depending on coring interval), the EM-31 can cover 0.5 to 2 hectares per day (depending on line density), the auger team can excavate and record 10 to 20 bore holes, and the Syscal Kid can recored 60 to 120 m of pseudo-profile (depending on density, depth, and line length). The protocol takes advantage of the fact that remote sensing is much less subject to size biases (Carr 1982; Clark 1990) than shovel testing and coring, which tend to be better at identifying large sites (Krakker, Shott and Welch 1983; Nance and Ball 1986; Lightfoot 1986; Shott 1987, 1989; Wobst 1983). By combining coring and remote sensing we maximize subsurface survey effectiveness for identifying sites and for examining areas where not sites are likely to have existed. A combined approach gives us reliable positive and negative evidence for settlement pattern analysis.
Establishing reliable negative evidence is critical for settlement pattern analysis. The entire landscape must be evaluated to determine which areas may have once had remains but may no longer be preserved (e.g., deeply plowed fields and eroded areas), which areas have conditions for good turf structure preservation but sites are absent, and which areas have sites. Where fields have been plowed down to prehistoric soil horizons we examine the disturbed deposits for cultural material—even though architectural remains may not be preserved or are unlikely to be detected in the remote sensing. Establishing that areas have conditions for good preservation but are without sites is critical for estimating the level of site dispersion, so important in the case of Icelandic chiefdoms. On the whole, negative or ambiguous results are faster to obtain than positive ones but they are as important for an unbiased settlement survey.
Of the five areas in Skagafjörður we targeted for survey, the Langholt region had the best conditions for unbiased survey and that is where we have concentrated much of our effort. Langholt is series of Pleistocene beach ridges on top of a lateral moraine about 100 meters above sea level that divides the main valley of Skagafjörður from Sæmudarhlíð. Because the modern road is higher on Langholt than the traditional trial, most of the modern, non-turf houses have been built away from established farm mounds. Hjalti Pálsson (2001) has recently completed a history of the Langholt farmsteads and historically, the region is representative of a broad cross section of farms. The upper portions of the ridge have suffered some erosion, while the east side of the ridge, towards the main valley, has received substantial soil deposition and widely preserved the 1104 tephra layer (Thorarinsson 1971). On Langholt, we chose farms from different parts based on preservation conditions and created clusters based on large wealthy farms and their immediate neighbors with the idea of covering entire areas of neighboring farms to highlight variation between historically wealthy and poor farms.


After two seasons of field survey, we have covered 17 farms at various levels of intensity. On Langholt we have dated 10 sites with excavation, three of which were were well away from farm mounds, not visible on the surface, not recorded in placename records, and not part of local memory. Overall, the survey indicates that early farmsteads seem to fall into two categories, those with midden and structures over an area of at least 2500 m2 and those under 700 m2 (Table 2). Interestingly, all of the smaller farmsteads we have identified seem to be established between 1000 and 1100 AD while all of the large farmsteads (over 2500 m2) seem to have activity that took place before 1000 (Table 3). This implies that a two-tiered settlement hierarchy developed during the Commonwealth period as smaller sites were
Table 2: Settlement sites and Tephra dates
| Farm | Site # | Area of Midden and Structures (m2) | Tephra Earliest occupation | Abandoned |
|---|---|---|---|---|
| Hafsteinsstaðir | SK-071-001 | ≈650 | Between 1000 & 1104 | 1954 |
| Geitagerði | SK-064-010 | ≈225 | ? | ? |
| Torfgarður | SK-106-002 | ≈400 | Between 1000 & 1104 | 1964 |
| SK-106-100 | ≈225 | Between 1000 & 1104 | Before 1300 | |
| Grófargil | SK-089-001 | ≈400 | Between 1000 & 1104 | After 1300 |
| Hafsteinsstaðir | SK-071-001 | ≈400 | Between 1000 & 1104 | Modern |
| Meðalheimur | SK-111-201 | ≈400 | ? | ? |
| Víðimýri (†) | SK-111-010 | ? | Before 1104 | Modern |
| Glaumbær (†) | SK-111-010 | 3,300 | Before 1000 | Before 1104 |
| SK-111-010 | 6,400 | After 1104 | 1952 | |
| Stóra Seyla (†) | SK-104-100 | 3,500 | Before 1000 | Before 1104 |
| SK-104-001 | 3,900 | After 1104 | 1957 | |
| Reynistaður (†) | SK-063-009 | 2,025 | Before 1000 | Before 1300 |
| SK-063-010 | 10,000 B | efore 1300 Possibly before 1104 | Modern |
(†) Church Farms
Table 3: Accelerator Mass Spectrometry (AMS) dates.
| 14C | 2 Sigma | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Farm | Site # | Number | Material | Date B.P. | ± | δ13C | Date cal (AD) | Probability | Midpoint (AD) |
| Grófargil | 3-089-001 | AA55486 | Bone (Bos taurus) | 982 | 45 | -21.7 | 981-1163 | 0.996 | 1072 |
| Glaumbær | 3-111-010 | AA55489 | Bone (Ovis) | 969 | 43 | -21.3 | 993-1163 | 0.987 | 1078 |
| 3-111-010 | AA46688 | Charred wood (Betula pubescens) | 990 | 46 | -28.3 | 976-1163 | 0.991 | 1069 | |
| 3-111-010 | AA46689 | Bone (Bos taurus) | 1,017 | 56 | -21.3 | 937-1160 | 0.924 | 1048 | |
| Stóra Seyla | 3-104-100 | AA55484 | Bone (Ovis) | 1,012 | 43 | -20.36 | 959-1129 | 1.000 | 1044 |
| Hafsteinsstaðir§ | 4-071-001 | AA55485 | Bone (Ovis) | 1,158 | 44 | -20.77 | 779-983 | 1.000 | 879 |
| Reynistaður | 4-063-009 | Beta 167781‡ | Wood (Betula pubescens) | 1160 | 60 | -28.4 | 766-999 | 0.951 | 882 |
| 4-063-009 | AA46687 | Charred wood (Betula pubescens) | 1,189 | 32 | -28.8 | 772-899 | 0.897 | 836 | |
| Meðalheimur* | 3-111-201 | AA55488 | Burnt bone (unknown) | 4,110 | 700 | -24.01 | |||
| 3-111-201 | AA55487 | Charred wood (Betula pubescens) | 5,179 | 43 | -29.24 | ||||
| * Meðalheimur samples seems to be contaminated. | |||||||||
| § Hafsteinsstaðir dates are earlier than Table 2 suggest. | |||||||||
| ‡ Conventinal 14C Date | |||||||||
Figure 4: Langholt showing locations of farms mentioned in text. 11

established. Our survey also indicates that on the order of 25% and as many as 50% of sites established before 1000 AD may not be visible from the surface. Contrary to our expatiations, all but one of the small later farmsteads were marked by farm mounds. Conversely, half of the large early farmsteads had their earliest components well away from the largest farm mounds. These large sites had not been previously identified and the preservation was outstanding. If these results are representative of other parts of Skagafjörður and Iceland, it would imply that a substantial percentage of the earliest sites can only be found with sub-surface survey.
According to the Landnámabók, first settlers each claimed large areas (Figure 1). Three, chieftains, who gained their status outside Iceland, are specifically mentioned as settling in Skagafjörður. Their supposed land claims are highlighted in Figure 3. Their territories are not much larger than the average land claim but they are distributed in such a way as to be as far apart from each other as possible (Figure 1). That is, one of the primary determinants of settlement location of a chief may be the distance to other chiefs. That same evenly spaced pattern is mirrored in the distribution of the early large farms actually identified on Langholt (Figure 4).
At three farms on Langholt we identified occupations before 1000: Stóra Seyla, Reynistaður, and Glaumbær. At Víðimýri early occupation is indicated but no structure has been identified. The largest documented early occupation of these sites is at Stóra Seyla. The early site is about 140 m to the east of the visible farm mound just above the fjord bottom. Only 5 test trenches have been excavated, all on the perimeter of the settlement area which seems to be 3,200 m2. The site is bisected by an drainage ditch that runs right through the site and has eroded a substantial area. This lower site is complex and no obvious long-house can be identified from the remote sensing, coring, augering and excavation (Figure 5). Three of the test trenches indicate substantial occupation before 1000. All of the trenches indicate that this location was abandoned about 1100. Stream cuts through the midden of the visible upper farm mound indicate that occupation began there immediately after 1100.
Our test pits and test trenches at Víðimýri and Reynistaður indicate that these farmsteads were probably established before 1000. Little is preserved at Viðimýri because of extensive landscape alteration from the Víðimýará. Two 1 x 1 m test trenches indicate that there was occupation well before 1100. Although the 1000 layer was not present in either of the trenches, cultural material recovered in cores indicates that Víðimýri was occupied before that time. Reynistaður has two farm mounds, possibly both established before 1000. The earliest definite occupation at Reynistaður, sometime before 1000, was of Langhúshóll—a small oval mound 300 meters east of the large farm mound where most of the settlements seem to have been located. Whether these two occupations are contemporaneous or indicate a shift from Langhusehóll to the later site remains unclear.
Of the early large sites identified, Glaumbær, is particularly interesting. We identified a series of turf walls and a thin, but extensive, peat ash midden, 150 meters to the east of the old turf manner house that now houses the Glaumbær Folk Museum. The walls and midden were under an in place 1104 tephra layer. Less than 10% of the identified area has been excavated so little is known about the structure. However, the extensive remote sensing, excavation and coring suggests a long-house and farm buildings extending approximately 30 meters, surrounded by a midden that extends over 3,500 m2 (Figure 2). we have identified two parallel 2 meter thick turf walls, and two parallel 1.8 meter benches lining each side of a 1.8 meter wide tramped earth floor. Interestingly, there is one turf wall that seems to have been built before 1000 AD but that early wallʼs relationship to the main structure is unclear. It would appear that most of the occupation was after 1000 and the structure was abandoned before the 1104 AD Hekla fell. Bog iron working seems to have been a major activity at the site.
Local tradition had it that the turf house museum is located where all previous domestic structures had been. A test trench into the ash midden outside the back door of the turf manor house, indicates that the area around the turf museum was inhabited after the newly discovered long-house was abandoned. We found an ash midden immediately on top of an in-place 1104 tephra which lay on sterile soil. This would imply that sometime around 1100 AD the farm moved, just as at Stóra Seyla. No other structures occupied before 1300 AD were identified on the other hay fields of Glaumbær.
According to the Saga of the Greenlanders, the land at Glaumbær was bought by Þorfinnur karlsefni Þórðarson and his family after their return from a failed attempt to colonize Vínland. The other version of the Vínland story, the Saga of Erik the Red, implies, though does not explicitly state, that karlsefni lived at his fatherʼs farm, Reynistaður. According to both versions, karlsefniʼs wife, Guðríður Þorbjarnardóttir, accompanied Eirík rauða Þorvaldsson to Greenland, where she met karlsefni and went to Vínland with karlsefni. While in Vínland, Guðríður gave birth to a son, Snorri Þorfinnsson, who if existed, would be the first European born in the New World. After the family returned to Iceland, via Greenland and Norway, the Saga of the Greenlanders goes on to say that Guðríður went south (to Rome) on a pilgrimage and when she returned to Glaumbær, Snorri had built a church for her.
Many scholars believe that the last section of the Saga of the Greenlanders, which concerns Glaumbær, is unhistorical and anachronistic (e.g., Hermannsson 1966 [1936]; Ingstad & Ingstad 2001 Þorláksson 2001). While our research indicates that there was a turf wall built before 1000, the main long-house occupation appears to be consistent with the timing indicated in the Vínland sagas for the return of Guðríður and her family to Iceland. It seems to us that it is best to follow Wallaceʼs (2000) approach and combine as many elements as possible from the two stories and make them consistent with the archaeological record. This is especially pragmatic in Iceland, where it would be odd for sagas to differ on the location of family farmsteads. If the stories are true, it would imply that, the family spent the first winter at Reynistaður and then moved to Glaumbær. Then both Reynistaður and Glaumbær would have been in the possession of karlsefniʼs family.
We may never be able to establish any connection between between this possible long-house and the Vínland stories—although a piece of maple [Mosurr] found in further excavations might help. Nonetheless, the discovery is illuminating. It demonstrates how strong the bias is towards attributing the location of past structures to ruins viable today (cf. Friðriksson 1994). Most importantly, the long-house at Glaumbær seems to fit into a broader pattern, where in about 1100 AD large farms seem to shift locations.
The patterning of these large early farms is suggestive. It would appear that large sites seem to be established before 1000 and move locations about 1100. The placement and spacing of these large early farmsteads indicate little differential access to resources, each location was probably self sufficient. Much of the pattern comes from the spacing between the farms, and the negative evidence for the lack of farmsteads between identified sites is good, but many more farms and areas still need to be surveyed.
We expected that with this protocol we would find mostly early small farmsteads. However, we have only identified one early small farmsteads away from a farm mound (Torfgarður [SK-106-100] Table 2 and Figure 4). All of the other early small farms we have identified have been near on part of visible farm mounds. Furthermore, all of the smaller farms we have identified and have good chronological control on, were first occupied sometime between 1000 and 1100 AD. The distribution and timing of these small farmsteads suggests that they were split off from the early large farms that they seem to surround. Again, the negative evidence, which could be more complete, is nonetheless suggestive. Many of the smaller farms are historically identified as either tenant or subtenant farms of the larger farms they surround. If most early farms are initially large, and smaller farms are split off later, then it implies that lower status individuals established farms on the land of their patron. The archaeology of the large and small farmsteads suggest that the sharecropper or hjaleiga system may have been established as early as the mid-11th century.
To summarize our very preliminary results. If historical sources such as Landnámabók are reliable, initial land claims were quickly divided into widely dispersed, large farms. Sometime between 1000 and 1100 AD, these large farm properties were subdivided with the addition of smaller farms, possibly of lower status (Figure 4). Sometime around 1100, many of the larger farms are reorganized and shift locations. This relatively rapid sequence of changes suggests that social structure was quite dynamic during the Commonwealth. The lack of a two-tiered settlement hierarchy until after 1000 AD argues for Gilmanʼs (1995) suggestion, that social stratification was initially based on exploitation and later became institutionalized.
Farmhouse location appears to quite stable after 1100 AD and the distribution of present day farm mounds may be broadly representative of the medieval settlement pattern. Before 1100 AD, the settlement pattern seems to be very dynamic and sub-surface survey is necessary for an unbiased survey because a substantial portion of these sites are not visible on the surface. Excavations of large farmsteads and the surrounding later smaller ones will be necessary to more fully understanding the sequence and relationship.
The National Imagery and Mapping Agency (NIMA, formerly the Defense Mapping Agency) adopted a special grid for military use throughout the world called the Universal Transverse Mercator (UTM) grid. In this grid, the world is divided into 60 north-south zones, each covering a strip 6° wide in longitude. These zones are numbered consecutively beginning with Zone 1, between 180° and 174° west longitude, and progressing eastward to Zone 60, between 174° and 180° east longitude. In each zone, coordinates are measured north and east in meters. The northing values are measured continuously from zero at the Equator, in a northerly direction. A central meridian through the middle of each 6° zone is assigned an easting value of 500,000 meters; grid values to the west of this central meridian are less than 500,000; to the east, more than 500,000.
Our work employed the UTM grid system as augmented by Steinberg (1997). The primary units of analysis are 50 x 50 m survey “blocks.” These blocks are assigned UTM coordinates based on their southwest corner, for example 0463855 East, 6305350 North (500000-463855 = 36145 m from the Meridian). As in a normal UTM system (Cole 1992), the measurements in our nested UTM system are based on metric Cartesian coordinates (UTM grid zone 27). All units for collection and analysis of data and artifacts are provenienced at their southwestern corner. As the analytical units become larger, the number of digits in their provenience becomes smaller. For example, the coordinates of the block, have 6 digits (e.g., E 046750, N 710450). The provenience of the excavation unit is calculated to 7 digits (e.g., 0467567, 7104567). Soil samples and features are calculated to the decimeter (04675678, 71045678), and point provenienced artifacts or radiocarbon samples are calculated to the centimeter (046756789, 710456789). While excavating, a level, elevation or depth is added to the Nested UTM coordinate, so that no two units have the same designation (e.g., 0467567, 7104567, 10).
The advantages of adopting the nested UTM System are threefold. First, the recording system is immediately compatible with many other recording systems (Hansen 1992). It has the potential to be a worldwide standardized system of recording artifactual data. Second, the system allows for comparisons across different data sets simply by removing digits to the place of the appropriate analytical unit of analysis. For example, point provenienced artifacts can be analyzed with their appropriate excavation unit simply by removing the last two digits. Finally, nested UTM squares are easy to computerize. The simplicity and universal nature of the nested UTM System makes it easily adaptable on excavation and survey projects of all scales.
All sites investigated in the were first grided by scanning the basic quad map and superimposing a block grid of hectare and 50x50 lines. Datums were set where identifiable landscape makers intersected grid lines. A color system of flags (orange for ha, yellow for 50x50, white for 10x10, and red for 2) was placed at the southwest corner of each nested unit. All units are aligned UTM grid north, which in Mosfell is 0º 47ʼ west of true north.
Remote Prospection
The EM 31- MK2 is an updated version of the standard EM 31, with which we had great success in 1999. The MK2 incorporates the data logger into the control console, which can be removed for easy data handling, or hand carried during the survey. Real-time logging is available by connecting a computer directly to the RS-232 output port on the front panel. The EM 31-MK2 maps any subsurface feature associated with changes in the ground conductivity using a patented electromagnetic inductive technique that makes the measurements without electrodes or ground contact. With this inductive method, surveys are readily carried out in all regions including those of high surface resistivity such as sand, gravel, and asphalt. The effective depth of exploration is about six meters, making it ideal for archaeology.
Following Bevan (1983) we used a grid spacing of 2 m. While it is possible to do both EM and magnetic prospection with the same machine (e.g., the EM-38, Tabbagh 1984, 1986:580), the ability to measure conductivity at a greater depth argued for the EM-31 in Iceland (cf. Rapp and Hill 1998:188). Clark (1990) does not recommend The EM-31 for archaeological investigations because the long (4m) boom, theoretically makes for a relatively coarse (0.8m) resolution, but excellent depth (about 3 m, depending on conditions). However, we have found that the at depths of 1 m, the EM-31 is sensitive to changes over distances of less than 50 cm.
All readings are of apparent ground conductivity using the quadrature component. Negative numbers in the survey data are due to the height and surrounding conductivity at which the instrument was calibrated. While the readings (including negative numbers) are not absolute conductivity readings, the distance between any two numbers is consistent (i.e., a conductivity change of 3 millisiemens is a constant difference, even between sites).
The goal of the survey was to identify buried turf walls, which are slightly resistive linear targets. As it turns out, natural conductivity changes in most fields in Iceland are as strong or stronger than most human-induced changes; but the natural changes typically take place over greater distances. The range of readings used in displaying remote sensing data can be a determinant in the identification of anomalies (Zhurbin and Malyugin 1998). All scales for magnetic gradient and conductivity were created with a basic box-and-whisker algorithm in which the display range does not extend to the extreme readings. That is, the scales cover the box-and-whisker portions of the range (Table 1). The upper end of the display scale was set to the median plus the sum of quartile 3 and 1.5 times the interquartile range. The lower end of the scales ranges from the median down to the sum of quartile 2 and 1.5 times the interquartile range. Colors or shades of gray for the scales were determined by:
(1) where x is reading, lw is the lower whisker, wr is the whisker range and c is the color or shade of gray. The spectrum for each graph is the total length of the interquartile range plus the two whiskers. This range is spread over 60 different colors or shades of gray. It should be noted that because of the dramatic differences between the base readings at different sites, colors or shades of gray from one site to the next are not comparable.
The Graphs were created in SYSTAT 5.0 for the Macintosh. The colors on the maps use a wavelength scale (nanometers) from 400 (purple) to 700 (red), in which each increment is an increase of
5. The lower whisker is 400 and the upper whisker is 700. Gray scale maps use a corresponding scale of 0-100% with 60 increments of gray, with each stop increasing by 1.66%. Magnetic gradient, raw conductivity scores and the maximum difference in conductivity were converted using the following equation:
(2) Where c is the conductivity (or the maximum difference in conductivity), lw is the lower whisker, and wr is the whisker range.1 Readings smaller than the lower whisker are purple and readings greater than the upper whisker are dark red (for similar shortenings see Ladefoged et al. 1995). In accordance with identifying our turf wall-eolian soil interface, this scale emphasizes variation with the main reading range.
The Syscal Kid is especially designed for shallow resistivity imaging. The Switch 24 features an internal switching board supporting 24 electrodes. Two cable strings with 12 electrode take outs each are connected to the back of the meter. The included software automatically performs roll-along surveys, which are quickly completed, even with a single operator.
1st Plot Site Location Filename Date Direction Length Minimum "a" Number 1st Electrode Pnt. Fieldbook (m) Spacing (m) Spacings Meas.
Glaumbaer GB060E 7/23/02 S-N " GB576N 7/23/02 W-E " GB576NA 7/25/02 W-E " GB582NA 7/25/02 W-E " GB594NA 7/25/02 W-E " GB540N 7/26/02 W-E " GB540NA 7/26/02 W-E " GB030E 7/26/02 S-N " GB034E 7/27/02 S-N " GB038E 7/27/02 S-N
" CNL15E 7/28/02 W-E
53.5 0.50 7 546 060E, 549.25N 550N I: 67-68 59.5 0.50 7 612 023.25E, 576N 024E I: 69-70 41.5 0.50 7 414 063.25E, 576N 064E I: 71-72 41.5 0.50 7 414 063.25E, 582N 064E I: 72-73 53.5 0.50 7 546 053.25E, 594N 054E I: 73-74 71.5 0.50 7 744 -000.75E, 540N 000E I: 75-76 23.5 0.50 7 216 059.25E, 540N 060E I: 77 41.5 0.50 7 414 030E, 533.25N 540N I: 77-78 47.5 0.50 7 480 034E, 533.25N 540N I: 79-80 53.5 0.50 7 546 038E, 533.25N 540N I: 80-82 000.75E, 582N to35.5 0.50 7 348 035.5E, 584N(1) I: 83-84
TOTAL 11 522.5 5280
Gorfargil GR291N 8/6/02 E-W 65.5 0.50 7 678 306.75E, 291N 306E I: 89-91 " GR289E 8/6/02 S-N 53.5 0.50 7 546 289E, 267.25N 268N I: 91-92
TOTAL 2 119.0 1224
47.5 0.50 7 480 157E, 026.25N 027N I: 96-97 31.0 0.50 7 332 129.25E, 046N 130E I: 98 29.5 0.50 7 282 153.25E, 046N 154E I: 99
Hafsteinstedir HS157E 8/18/02 S-N " HS046N 8/19/02 W-E " HS046NA 8/19/02 W-E TOTAL 3 108.0 1094
Holar western field HO380E 6/28/02 S-N " " HO384AE 6/29/02 S-N " " HO388E 7/1/02 S-N " " HO392E 7/1/02 S-N " " HO396E 7/1/02 S-N " " HO400E 7/2/02 S-N " " HO404E 7/2/02 S-N " " HO665AN 7/2/02 W-E " " HO660N 7/3/02 W-E
41.5 0.50 7 414 6380E, 1644N I: 5-7 41.5 0.50 7 414 6384E, 1643.25N 1644N I: 8-11 41.5 0.50 7 414 6388E, 1643.25N 1644N I: 12-13 41.5 0.50 7 414 6392E, 1643.25N 1644N I: 13-14 41.5 0.50 7 414 6396E, 1643.25N 1644N I: 14-15 35.5 0.50 7 348 6400E, 1643.25N 1644N I: 16-17 35.5 0.50 7 348 6404E, 1643.25N 1644N I: 17-18 41.5 0.50 7 413 6373.25E, 1665N 6374E I: 18-19 53.5 0.50 7 546 6373.25E, 1660N 6374E I: 20-21
subtotal 9 373.5 3725
Holar northern field HO707N 7/3/02 W-E " " HO717N 7/3/02 W-E " " HO726N 7/4/02 W-E
29.5 0.50 7 282 6385.25E, 1707N 6386E I: 21-22 47.5 0.50 7 480 6374.25E, 1717N 6375E I: 22-23 41.5 0.50 7 414 6374.25E, 1726N 6375E I: 25-26
subtotal 3 118.5 1176 TOTAL 12 492.0 4901
Stora Seyla upper field ST022E 7/8/02 S-N " " ST020E 7/8/02 S-N " " ST016E 7/9/02 S-N " " ST440N 7/9/02 W-E " " ST430N 7/10/02 W-E " " ST044E 7/10/02 S-N " " ST040E 7/11/02 S-N " " ST426N 7/11/02 W-E 47.5 0.50 7 480 0022E, 3399.25N 3400N I: 27-28 23.5 0.50 7 216 0020E, 3420.25N 3421N I: 29 71.0 1.00 7 348 0016E, 3398.5N 3400N I: 30-31 41.5 0.50 7 414 -0000.75E,3400N 0000E I: 31-32 53.5 0.50 7 546 -0000.75E,3430N 0000E I: 33-34 53.5 0.50 7 546 0044E, 3399.25N 3400N I: 35-36 53.5 0.50 7 546 0040E, 3999.25N 3400N I: 37-38 35.5 0.50 7 348 0016.25E, 3426N 0017E I: 39-40
subtotal 8 379.5 3444
Stora Seyla lower field ST530N 7/12/02 W-E 47.5 " " ST072E 7/13/02 S-N 47.5 " " ST077E 7/15/02 S-N 53.5 " " ST080E 7/15/02 S-N 53.5 " " ST083E 7/15/02 S-N 53.5
" " ST091NW 7/16/02 SE-NW 47.5
" " ST096NW 7/16/02 SE-NW 47.5
" " ST101NW 7/16/02 SE-NW 53.5 " " ST538N 7/17/02 W-E 53.5 " " ST541N 7/17/02 W-E 47.5 " " ST544N 7/17/02 W-E 41.5 " " ST522N 7/18/02 W-E 53.5 " " ST516N 7/18/02 W-E 53.5 " " ST510N 7/18/02 W-E 53.5
0.50 7 480 0059.25E, 3530N 0060E I: 41-42 0.50 7 480 0072E, 3499.25N 3500N I: 43-44 0.50 7 546 0077E, 3499.25N 3500N I: 45-46 0.50 7 546 0080E, 3499.25N 3500N I: 47-48 0.50 7 546 0083E, 3499.25N 3500N I: 48-49 091E, 508N to0.50 7 480 065E, 547N(2) I: 50-51 096E, 508N to0.50 7 480 070E, 547N(2) I: 51-52 101E, 508N to0.50 7 546 072E, 552N(2) I: 52-55 0.50 7 546 0050.25E, 3538N 0051E I: 56-57 0.50 7 480 0059.25E, 3541N 0060E I: 57-58 0.50 7 414 0064.25E, 3544N 0065E I: 58-60 0.50 7 546 0049.25E, 3522N 0050E I: 61-62 0.50 7 546 0049.25E, 3516N 0050E I: 63-64 0.50 7 546 0049.25E, 3510N 0050E I: 64-66
subtotal 14 707.0 7182 TOTAL 22 1086.5 10626
Torfgardur
"
"Torfgardur "
(1) From 1stplot point tolast electrode(2) From 1st tolast plot points
house mound TG814SWTG835NWTG874SW
subtotal
northern field TG747ETG748E
subtotalTOTAL
7/29/027/29/027/30/02
8/12/028/12/02
SW-NE SE-NWSW-NE
S-N
S-N 35.0
47.0
94.0
176.0
53.5
53.5
107.0
283.0
1.00
1.00
2.00
0.50
0.50 7 150
7 216
7 216
582
7 546 7 546
1092
9814E, 3846N to9833E, 3873N(1)9835E, 3821N to9814E, 3861N(1)
9874E, 3899N to9800E, 3845N(1)
747E, 968.25N748E, 968.25N
I: 85
I: 85-86
I: 87-88 969N I: 93-94 969N I: 94-95
1674
Iteration 3 RMS error = 1.48 %


GB576NA WE GB582NA WE GB594NA WE





S
m


540 550
m
S
N
560
570
580
590
Iteration 3 RMS error = 1.31 %
uncut grass
cut grass
0.2 m south)

25 75 125 175 225 275 325 375
Resistivity (ohm m)
unit electrode spacing = 0.50 m
W E

m
E

N


HS046N WE

S
m
1645
1650
1660

SN m
1644
1650
1660
1670
1680
1684

S
N
m
1644
1650
1660
1670
1680
1684

SN
m
1644
1650
1660
1670
1680
1684

SN m
1644
1650
1660
1670
1680
1684

SN m
1644
1650
1660
1670
1678

SN m
1644
1650
1660
1670
1678

E

E

E





N 0 5 m
large rock buried rock hit by electrode monument tree boundary of initial excavation

N
0 5 m
auger hole buried rock hit by electrode soil pile from excavation
boundary of excavation at time of survey church wall

N


N

ST083E SN

NW






E



N

N

Excavations
Initial excavations of 2001 established the existence of a substantial peat ash deposits, well preserved turf walls, and tramped earth floors. Initial excavations failed to reveal any stone foundations to the turf walls but did uncover a few curb stones at floor edges.
The goals of the 2002 season was to confirm the layout of the structure and establish that it was a dwelling. Intensive remote sensing was conducted over the entire area with both the EM-31 and the Syscal Kid. Before excavation commenced. The excavation consisted of re excavating the 2001 trenches and the excavation of two trenches through the structure.
With the assistance of Guðmundur Ólafsson, we were able to select an off grid angle that crosscut the structure (Figure 7) This revealed two well preserved 1.8 m wide turf walls, Inside of the walls were poorly compacted layers of mixed midden and turf that dropped down at some small rocks that seem to have bordered the tramped earth floor. The overall interpretation of the profile is that of very think turf walls outside of 1.8 m benches that lined the sides of a 1.85 m 10 cm thick floor (highlighted in Figure 8). This floor, bench, wall sequence seems to be overlaid with turf fall, very thin layer of aeolian soil and then the H1 tephra layer. There is a second wall, east of the east wall of the structure. The turf of this wall has a different appearance and Magnus A. Sigurdsson has identified the H 1000 layer on top of the lower portion of the most eastern turf wall, suggesting that the bottom portion of the wall was constructed before 1000, which has implications for an archaeological interpretation if the Saga of the Greenlanders. The 1000 layer has only been identified in soil cores well away from the identified structure. It has not been found in or on top of any of the turfs that make up the other walls. Therefore, both tephra and AMS dating point to a main occupation of the structure between 1000 and 1100 AD. However there may well be an earlier occupation. No part of the structure could have been used after 1104.
In an effort to determine if the turf manner house that is now part of the Glaumbær museum was occupied contemporaneously, a multiple profile excavation trench was excavated into the south side of the ash mound near the kitchen door of the manner house. The ash pile is over two meters tall and extends 70 cm below the modern ground surface. The non-stratified ash midden is underlain by the H1 tephra layer which at that sport is found on top of sterile aeolian soil (Figure 11). If the chronology of this mound can be extended to the rest of the upper settlement, it would imply that the recently discovered long-house is not contemporaneous with the settlement at the manor house.


Figure 7. Glaumbær trenches
R R

Figure 8 South profile of off Grid trench through long access of house.
Soils
SASS Profile
Brown Gray Gravel Sand
Key
Sterile
Tephra or
1766130011041000LNL
Turf & Floor and other Direct cultural deposits
Wall Wall Fall
Tramped earth
Hay
Midden
Peat Ash
Wood Ash
Mixed
Sample R Rock W Wood C Charcoal

West wall

east wall

Figure 11. Peat-ash midden outside mannor house at Glaumbær
Stóra-Seyla Besides the excavations based on the remote sensing, we also excavated a 1x1 m test trench into the location traditionally thought to be that of the chapel and later meeting house. This test trench shows no signs of any turf structure (Figure 14). Today it is the location of a garbage dump and the majority of the cultural material is peat-ash, indicating continuity.

Figure 12 Stóra-Seyla excavation location.

Figure 13. Stóra-Seyla contor map

Figure 14. Stóra-Seyla test trench into location taditionally held as that of the chapel.
Six samples were submitted for AMS dateing from the 2002 season. The forms and calabration curves are presented below.
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NSF ARIZONA AMS FACILITY NSF ARIZONA AMS FACILITY The University of Arizona The University of Arizona
Physics Building 81 Tel. (520) 621-6810 Physics Building 81 Tel. (520) 621-6810 Tucson, Arizona 85721 Fax. (520) 621-9619 Tucson, Arizona 85721 Fax. (520) 621-9619 USA. Electronic mail: USA. Electronic mail:
AMS@physics.arizona.edu AMS@physics.arizona.edu
Please read the attached supplemental information and agreement Please read the attached supplemental information and agreement
AA -User sample no. Date received at AMS lab: AA -User sample no. Date received at AMS lab: Sample target no. SASS HS 12 Sample target no. SASS MD 15
Submitted by: Supported by NSF Division: Date submitted: 5/25/03 Submitted by: Supported by NSF Division: Date submitted: 5/25/03 John M. Steinberg Archaeology John M. Steinberg Archaeology Affiliation and address: Grant no: BCS 0107413 Date collected: 8/02/02 Affiliation and address: Grant no: BCS 0107413 Date collected: 8/02/02 UCLA, Inst. Archaeology Other agency: UCLA, Inst. Archaeology Other agency: A-210 Fowler Sample material: A-210 Fowler Sample material: LA CA 90095-1510 Bone LA CA 90095-1510 Burnt bone Telephone: (310)794-9485 SITE INFORMATION Telephone: (310)794-9485 SITE INFORMATION FAX: (310)206-4723 FAX: (310)206-4723 E-mail: jmstein@ucla.edu Name Hafsteinstadir E-mail: jmstein@ucla.edu Name Medalheimer Weight (mg): 0.5 g Weight (mg): 0.4 g Region Skjafjordur Region Skjafjordur Collected by: County Identified by: Collected by: County Identified by: n/a John Steinberg State/Province Doug Bolender State/Province Affiliation and address: Country Iceland Affiliation and address: Country Iceland UCLA, Archaeology Cultural or time range UCLA, Archaeology Cultural or time range Map reference of the site: Map reference of the site:
A-210 Fowler AD 800-1700 A-210 Fowler AD 800-1700 LA CA 90095-1510 Latitude UTME 0565117
Previous dates from the LA CA 90095-1510 Latitude UTME 0567691 Previous dates from the Longitude UTMN 7282972 site: N/A Longitude UTMN 7277004 site: N/A
Expected age and on what basis. Expected age and on what basis. Cite any previous 14C dates and relevant cultural, paleoenviromental information Cite any previous 14C dates and relevant cultural, paleoenviromental information
Sample was pulled from peat ash midden matrix below 7 cm below AD 1104 tephra layer Sample was pulled from South east corner of profile. No tephra associated. Just above AD 1000 tephra layer. Both tephra layers are probably in situ.
Associated cultural, paleontological, paleobotanical or other material: Associated cultural, paleontological, paleobotanical or other material:
Burned wood charcoal, and burned peat ash. Burned wood charcoal, burned peat ash, and unburnt turf.
Stratigraphic position, includingdepth in core. Stratigraphic position, includingdepth in core. Attach a diagram if necessary Attach a diagram if necessary
277 cm below ground surface 160 cm below ground surface
Sample pre-treatment: Sample pre-treatment:
None None
Special instructions: Special instructions:
Note: Samples of soil and sediment must be submitted wrapped in Al foil, and contained in a sealed container. This is also a good way Note: Samples of soil and sediment must be submitted wrapped in Al foil, and contained in a sealed container. This is also a good way to submit any type of sample. to submit any type of sample.
Accelerator Laboratory Use Only Accelerator Laboratory Use Only
Pricing: Commercial____ Academic ____ NSF ____ Student ____ Gas ____ Graphite ___ Other ____ Pricing: Commercial____ Academic ____ NSF ____ Student ____ Gas ____ Graphite ___ Other ____
13C required ____ Deadline ____________ d13C required ____ Deadline ____________
We request that users acknowledge the University of Arizona and the National Science Foundation when the results are published. We also request We request that users acknowledge the University of Arizona and the National Science Foundation when the results are published. We also request
that a copy of any published material be sent to the laboratory. that a copy of any published material be sent to the laboratory.
NSF ARIZONA AMS FACILITY NSF ARIZONA AMS FACILITY The University of Arizona The University of Arizona
Physics Building 81 Tel. (520) 621-6810 Physics Building 81 Tel. (520) 621-6810 Tucson, Arizona 85721 Fax. (520) 621-9619 Tucson, Arizona 85721 Fax. (520) 621-9619
USA. Electronic mail: USA. Electronic mail:
AMS@physics.arizona.edu AMS@physics.arizona.edu
Please read the attached supplemental information and agreement Please read the attached supplemental information and agreement
AA -User sample no. Date received at AMS lab: AA -User sample no. Date received at AMS lab: Sample target no. SASS GR 13 Sample target no. SASS GB 16
Submitted by: Supported by NSF Division: Date submitted: 5/25/03 Submitted by: Supported by NSF Division: Date submitted: 5/25/03 John M. Steinberg Archaeology John M. Steinberg Archaeology Affiliation and address: Grant no: BCS 0107413 Date collected: 8/02/02 Affiliation and address: Grant no: BCS 0107413 Date collected: 8/02/02 UCLA, Inst. Archaeology Other agency: UCLA, Inst. Archaeology Other agency: A-210 Fowler Sample material: A-210 Fowler Sample material:
LA CA 90095-1510 mature bovine crainium LA CA 90095-1510 bone Telephone: (310)794-9485 SITE INFORMATION Telephone: (310)794-9485 SITE INFORMATION FAX: (310)206-4723 FAX: (310)206-4723 E-mail: jmstein@ucla.edu Name Grofergil Weight (mg): E-mail: jmstein@ucla.edu Name Glaumbaer Weight (mg): 1.3 g
1.3 g
Region Skjafjordur Region Skjafjordur Collected by: County Identified by: Tom Wake Collected by: County Identified by: n/a John Steinberg State/Province Elizabeth Ward State/Province Affiliation and address: Country Iceland Affiliation and address: Country Iceland UCLA, Archaeology Cultural or time range UCLA, Archaeology Cultural or time range
A-210 Fowler Map reference of the site: AD 800-1700 A-210 Fowler Map reference of the site: AD 800-1700
LA CA 90095-1510 Latitude UTME 0570050 Previous dates from the LA CA 90095-1510 Latitude UTME 0569050.39
Previous dates from the Longitude UTMN 7272520 site: N/A Longitude UTMN 7277560.35 site: N/A
Expected age and on what basis. Expected age and on what basis. Cite any previous 14C dates and relevant cultural, paleoenviromental information Cite any previous 14C dates and relevant cultural, paleoenviromental information
Sample was pulled from trampled earth floor with turf wall fall Sample was taken from 'butter bone' in floor of trench. and peat ash midden matrix. Associated with AD 1104 Tephra Layer. Associated with AD 1104 Tephra Layer.
Associated cultural, paleontological, paleobotanical or other material: Associated cultural, paleontological, paleobotanical or other material:
Burned wood charcoal, and burned peat ash, unburnt turf. Burned wood charcoal, burned peat ash, burnt turf and un burnt turf.
Stratigraphic position, includingdepth in core. Stratigraphic position, includingdepth in core. Attach a diagram if necessary Attach a diagram if necessary
83 cm below ground surface 90 cm below ground surface
Sample pre-treatment: Sample pre-treatment:
None None
Special instructions: Special instructions:
Note: Samples of soil and sediment must be submitted wrapped in Al foil, and contained in a sealed container. This is also a good way Note: Samples of soil and sediment must be submitted wrapped in Al foil, and contained in a sealed container. This is also a good way to submit any type of sample. to submit any type of sample.
Accelerator Laboratory Use Only Accelerator Laboratory Use Only
Pricing: Commercial____ Academic ____ NSF ____ Student ____ Gas ____ Graphite ___ Other ____ Pricing: Commercial____ Academic ____ NSF ____ Student ____ Gas ____ Graphite ___ Other ____
13C required ____ Deadline ____________ d13C required ____ Deadline ____________
We request that users acknowledge the University of Arizona and the National Science Foundation when the results are published. We also request We request that users acknowledge the University of Arizona and the National Science Foundation when the results are published. We also request
that a copy of any published material be sent to the laboratory. that a copy of any published material be sent to the laboratory.
NSF ARIZONA AMS FACILITY NSF ARIZONA AMS FACILITY The University of Arizona The University of Arizona
Physics Building 81 Tel. (520) 621-6810 Physics Building 81 Tel. (520) 621-6810 Tucson, Arizona 85721 Fax. (520) 621-9619 Tucson, Arizona 85721 Fax. (520) 621-9619 USA. Electronic mail: USA. Electronic mail:
AMS@physics.arizona.edu AMS@physics.arizona.edu
Please read the attached supplemental information and agreement Please read the attached supplemental information and agreement
AA -User sample no. Date received at AMS lab: AA -User sample no. Date received at AMS lab: Sample target no. SASS MD 14 Sample target no. SASS ST 11
Submitted by: Supported by NSF Division: Date submitted: 5/25/03 Submitted by: Supported by NSF Division: Date submitted: 5/25/03 John M. Steinberg Archaeology John M. Steinberg Archaeology Affiliation and address: Grant no: BCS 0107413 Date collected: 8/02/02 Affiliation and address: Grant no: BCS 0107413 Date collected: 8/02/02 UCLA, Inst. Archaeology Other agency: UCLA, Inst. Archaeology Other agency: A-210 Fowler Sample material: A-210 Fowler Sample material: LA CA 90095-1510 Wood, Brich: Betula Sp. LA CA 90095-1510 Mature 1st rib from sheep Telephone: (310)794-9485 SITE INFORMATION Telephone: (310)794-9485 SITE INFORMATION (or goat) with cut marks FAX: (310)206-4723 FAX: (310)206-4723 E-mail: jmstein@ucla.edu Name Medalheimer E-mail: jmstein@ucla.edu Name Stora Seyla Weight (mg): 0.6 g Weight (mg): 3.9 g Region Skjafjordur Region Skjafjordur Collected by: County Identified by: Steve Martin Collected by: County Identified by: Tom Wake Steve Martin State/Province Nilka Dabare State/Province Affiliation and address: Country Iceland Affiliation and address: Country Iceland UCLA, Archaeology Cultural or time range UCLA, Archaeology Cultural or time range Map reference of the site: Map reference of the site:
A-210 Fowler AD 800-1700 A-210 Fowler AD 800-1700 LA CA 90095-1510 Latitude UTME 0567691
Previous dates from the LA CA 90095-1510 Latitude UTME 0569043.5 Previous dates from the Longitude UTMN 7277004 site: N/A Longitude UTMN 7277584.5 site: N/A
Expected age and on what basis. Expected age and on what basis. Cite any previous 14C dates and relevant cultural, paleoenviromental information Cite any previous 14C dates and relevant cultural, paleoenviromental information
Sample was pulled from float sample. Sample was pulled from peat ash midden matrix possibly above AD 1104 tephra layer
Associated cultural, paleontological, paleobotanical or other material: Associated cultural, paleontological, paleobotanical or other material:
Burned wood charcoal, and burned peat ash, unburnt turf. Burned wood charcoal, and burned peat ash.
Stratigraphic position, includingdepth in core. Stratigraphic position, includingdepth in core. Attach a diagram if necessary Attach a diagram if necessary
142 cm below ground surface 99 cm below ground surface
Sample pre-treatment: Sample pre-treatment:
None None
Special instructions: Special instructions:
Note: Samples of soil and sediment must be submitted wrapped in Al foil, and contained in a sealed container. This is also a good way Note: Samples of soil and sediment must be submitted wrapped in Al foil, and contained in a sealed container. This is also a good way to submit any type of sample. to submit any type of sample.
Accelerator Laboratory Use Only Accelerator Laboratory Use Only
Pricing: Commercial____ Academic ____ NSF ____ Student ____ Gas ____ Graphite ___ Other ____ Pricing: Commercial____ Academic ____ NSF ____ Student ____ Gas ____ Graphite ___ Other ____
13C required ____ Deadline ____________ d13C required ____ Deadline ____________
We request that users acknowledge the University of Arizona and the National Science Foundation when the results are published. We also request We request that users acknowledge the University of Arizona and the National Science Foundation when the results are published. We also request
that a copy of any published material be sent to the laboratory. that a copy of any published material be sent to the laboratory.
79
Turf, from the upper levels of peat bogs, provided the farmers and pastoralists of Viking Age and Late Norse (874-1500 AD) Scandinavia with an ideal building material (contributions to Myhre, Stoklund and Gjærder; 1982 Urbanczyk 1999. Turf procurement and construction methods in Medieval Iceland are well understood (e.g., Berson 2002; Sigurðardóttir 1998; Smith 1995). The volcanic tephra layers incorporated into turf walls have been routinely used for dating (Vésteinsson 2000) and therefore changes in construction techniques, especially for the earliest phases, are well understood. However, the post-depositional behavior of buried turf in archaeological contexts is not well understood. The tests described below were performed to see if it were possible, practical, and productive to quantify the organic content of turf walls in buried archaeological contexts.
These tests were run as part of the work of the Skagafjörður Archaeological Settlement Survey (SASS). The SASS project developed and implemented a protocol of surface survey, coring, augering, remote sensing (conductivity and resistivity), and test trenches to identify and explore archaeological remains without any surface sign (Steinberg and Bolender in press). The successful identification of anomalies associated with archaeological sites depends on the preserved remains having distinguishing characteristics. The main component of turf, and an important attribute that distinguishes the walls from the surrounding soil, is turfʼs high organic content (Crowther 2002). Therefore, an understanding of the post-depositional behavior of turf might be important for the identification of biases in site identification using remote sensing.
Turf is primarily composed of Sphagnum (the peat mosses). Sphagnum is the only genus in the class Sphagnopsida but it consists of more than 300 species. Sphagnum has two special properties: through selective ion absorption, the pH in the center of a tuft of peat moss is often lower (pH=4.4) than surrounding soil and water (pH=6.0) and, due to a unique and unusual arrangement of two different kinds of cells in the leaves, it is highly absorptive. Therefore, areas inhabited by Sphagnum are extremely acidic. This prevents the dead Sphagnum and other organic material from decaying, creating peat deposits or bogs. Turf comes from the upper layers of partially compressed peat that has been cut and dried. When dry, the turf is light and has a consistency similar to cork, which, along with its good insulation properties, make it an excellent building material.
Once a turf house is abandoned, the strips and blocks of turf erode and fall in various directions, usually leaving only the bottom of the wall intact, but surrounded by a substantial area of turf fall. It is likely that in the coastal and fjord areas of Skagafjörður, turf structures abandoned during the Viking Age would have been buried rapidly, preventing their destruction by the wind and weather. Soil deposition studies (Guðbergsson 1975, 1994) indicate that most of the 30 to 90 cm of aeolian soil that has accumulated in lowland Skagafjörður over the last 1100 years from eroding highland areas (e.g., Dugmore and Buckland 1991), was deposited during the first 250 years of settlement (from 874-1100 AD, see also Thorarinsson 1961).
However, good conditions for preservation of turf structures do not necessarily imply that the identification of the early sites with substantial turf architecture is unbia