Coastal Archaeological Sites Research Articles

Coastal Wetland Sites and Coastal Cave Sites: Archaeological and Environmental Investigations around Lake Nakaumi and Lake Shinji areas, West Japan

Lake Nakaumi and Lake Shinji are coastal lakes facing the Japan Sea, located in the estuary areas of the River Hii. From an archaeological point of view, these areas are the zone where human activities have been developed intensively from the prehistoric period. Based on the specific characteristics of the archaeological sites around these areas, two kinds of coastal archaeological sites are distinguished. One is the coastal wetland site, the other the coastal cave site. Both kinds of site were developed facing the coast in each stage of environmental changes, therefore research on these sites plays an important role in reconstructing not only prehistoric human activities but also the palaeo-environment around these areas.

Mortuary Practices and Human Sacrifice in the Middle Chao Valley of Peru: Their Interpretation in the Context of Andean Mortuary Patterning

Investigations at several northern Peruvian coastal archaeological sites by archaeologists and physical anthropologists are beginning to provide details on long-term patterning of mortuary behavior. Some of these patterns include retainer sacrifice, child sacrifice, and the metaphorical principle we refer to as “like with like.” In this paper, we discuss the data relating to these mortuary patterns discovered at the site of Santa Rita B in the middle Chao Valley. Examples of each of the patterns presented are evident at the site. These include at least three child sacrifices and one adult sacrifice. The sacrifices appear to be retainer sacrifices, defined as sacrifices intended to accompany a deceased principal personage in the afterlife. The inclusion of the child sacrifices with a subadult principal burial is part of the “like with like” pattern seen here and at other Andean sites. Dating to the start of the Late Intermediate period (ca. A.D. 1100–1300), these finds are compared to other north coastal sites, both earlier and later, and the extent of temporal continuity in these patterns is discussed.

An Application of GIS Techniques to Assess the Risk of Disturbance of Archaeological Sites by Mass Movement and Marine Flooding in Auyuittuq National Park Reserve, Nunavut

Coastal regions within Auyuittuq National Park Reserve (ANPR) are sensitive to mass movement processes and threatened by flooding in response to sea level rise. These processes pose a risk to culturally significant archaeological sites within ANPR. Sites at risk of disturbance need to be identified and protected to conserve valuable archaeological resources. Since the costs of identifying and monitoring sites at risk in remote areas are substantial, modern technologies such as Geographic Information Systems (GIS) can be used to create a more rapid and cost-effective means to monitor coastal environments and manage coastal resources. This study examines the application of GIS technology to assess the risk of disturbance of 44 coastal archaeological sites by mass movement and marine flooding within ANPR. Data on surficial materials and slope angles are combined in an overlay analysis to assess terrain sensitivity to mass movement. The output from this analysis is a coarse regional assessment of mass movement potential as it relates to the strength of materials on slopes. The overall risk of disturbance for archaeological sites within ANPR is assessed by combining the risk of mass movement and the risk of marine flooding. Twenty-eight sites within ANPR are identified as being at considerable risk to disturbance: these sites are located largely on glaciomarine sediments at moderate or high slope angles and are at substantial risk to flooding (less than two metres above sea level).

Optically stimulated luminescence (OSL) dating of coastal aeolian sand accumulation in Sanday, Orkney Islands, Scotland

Optically stimulated luminescence (OSL) dating of sand has been used to identify periods of enhanced aeolian activity at two coastal archaeological sites in Orkney that coincide with periods of Holocene climatic deterioration recorded elsewhere in both Scotland and W Europe. Areas of Tofts Ness, Sanday were settled from the Neolithic, abandoned in the late Neolithic/early Bronze Age, reoccupied and permanently abandoned in the Iron Age. Sand layers above the Neolithic soils have been OSL dated to about 4000 BP, correlating well with a period of increased aeolian activity elsewhere in W Europe. OSL dating of aeolian sands above midden deposits and a Bronze Age burial at Lopness on Sanday suggest dune development by 3000 BP, although both sites also contain sand that was deposited during the `Little Ice Age'. Several possible mechanisms may have contributed to an increase in aeolian activity during the Holocene that led to the abandonment of these sites. Although volcanic eruptions in Iceland cannot be discounted as a contributory factor, a more likely driver of change in sand dune systems is the enhanced N Atlantic storminess suggested by ice core records from Greenland. During periods of climatic deterioration the declining productivity of other agricultural land places enhanced demands on agriculturally marginal sand dunes, leading to further destabilization and the potential for enhanced sand transport events.

Coastal environments and their role in prehistoric migrations

In recent years, increased attention has been turned towards the role of coastal environments in facilitating the global dispersal of humans. Previous approaches have focused on locating, dating and linking coastal archaeological sites, in order to create an overall impression of population movement across continents. When considerations of the actual process of colonization have been presented, they have been predicated on a series of assumptions regarding the nature of the coastal environment. The most important of these is that the coastal zone is homogenous and stable, on space and time scales relevant to human migration. This paper aims to test this and other assumptions by considering the true nature of the palaeo-coastal zone on global to continental scales and on timescales commensurate with migrating populations. Evidence is presented from Pleistocene and Holocene palaeo-environmental and archaeological records, so covering the major migrations of the Palaeolithic and Mesolithic. The principal conclusion of this study is that the coastal zone is in fact characterized by a significant degree of environmental heterogeneity and instability on a multitude of spatio-temporal scales. This in turn has significant implications for how we interpret the actual process of colonization.

The Glycymeris query along the coast and shallow shelf of Israel, southeast Mediterranean

High concentrations of empty valves of the genus Glycymeris are found along the Israeli coast, both at the water line and in adjacent archeological sites. In contrast with the abundance of the empty shells, live specimens are rare. This discrepancy raises the questions of when and where did Glycymeris live on the Israeli shelf and why and when did they disappear. In this study, concentrations of empty shells from contemporary depositional environments were sampled at 13 sites along the waterline and 91 sites on the Israeli inner shelf between 3 and 30 m water depth. In addition, 12 coastal archeological sites were sampled so as to determine the distribution of bivalves in the last few thousands years, and a random sample was checked for taphonomic characteristics. Six valves of Glycymeris insubrica were radiocarbon dated. Glycymeris shells comprise 89% to 100% of the total dead mollusks shells found south of Haifa with G. insubrica comprising up to 100% of the entire Glycymeris assemblage. In archeological sites, G. insubrica is also abundant. G. insubrica, an opportunist species, appeared in large numbers 5000–5500 years ago and almost ceased to exist 1500–1000 years ago. Taphonomic studies based on the present-day state of preservation of Glycymeris support the observation that they ceased to exist sometime after 2000 years ago. The sharp increase in their numbers is attributed to a combination of several factors. The inner shelf became oligotrophic 5500 years ago. The Late Holocene sea level rise slowed down considerably and nearly reached its maximum. Sandy sediments predominated and new habitats were open. The near disappearance of G. insubrica 1500 to 2000 years ago was probably due to the ongoing impoverishment of nutrient flux and reduction in marine productivity of the Eastern Mediterranean. It may also have been part of the natural succession of populations that replace each other resulting in a distinct community change.

Bronze Age farms and Iron Age farm mounds of the Outer Hebrides

Hebridean sites of the coastal sand cliffs and associated machair, or sandy plain have been known for many years. Artefacts and ecofacts of various types have long been collected from archaeological sites in the eroding sand-cliffs of the machairs of the Outer Hebrides. Early in 1983, personnel of the then Central Excavation Unit of Historic Scotland's predecessor revisited very nearly all of the coastal archaeological sites then known in the Long Isle, with the specific task of identifying those at immediate threat from coastal erosion and of assessing the feasibility of their excavation or preservation. Some 32 sites were seen to be undergoing active erosion; at nine of them preservation was not being pursued and excavation was feasible. These sites were of two morphotypes: sites exposed in roughly vertical sand-cliffs and sites exposed over relatively large horzontal areas of sand deflation. It was decided to examine one sand-cliff site along its exposed face. The site selected was Balelone in North Uist, its excavation designed to explore both the problems associated with the excavation of deep midden sites with complex stratigraphy and the not-inconsiderable problems of excavation in sand. In the light of the Balelone trial excavation, a new approach was called for. A structured approach aimed firstly at establishing the three-dimensional extent of the sites to be examined. Four sites were then sampled (the sand-cliff sites of Baleshare, on the island of the same name off the west coast of North Uist and Hornish Point, South Uist and the deflation sites of South Glendale, South Uist and Newtonferry, North Uist) within a rigorously-defined research framework.The machair sites were formed by sand accretion, facilitated by human activities ranging from construction to refuse disposal and cultivation. Their formation was intermittent and they underwent episodes of major erosion, isolating the sites from the landscape mass of the machair sands. Despite their apparent wealth of suitable material, the dating of Hebridean coastal sites presents special problems. The strategy here was to provide a dating framework for the sequences on each site, from which the dates of archaeological significant structures and events could then be arrived at by extrapolation. Preliminary dates from the earliest and latest strata at Balelone spanned such a small period that a First Millennium BC date-range could be assigned. At Baleshare, the deposits investigated were chiefly later Bronze Age; following abandonment (roughly 200 radiocarbon years) of the Period I cultivated soil Period II represented extensive, manured, cultivated fields in the vicinity of a settlement now lost to the sea. As Period II went on. the settlement seems to have moved closer to the excavated area. After another hiatus of a minimum of 350 radiocarbon years, there were further cultivated plots and associated settlement of Iron Age date (Period III). By contrast, the site at Hornish Point (including successive wheelhouses and associated cultivation areas) is considered to be all of one - dynamic, Iron Age - period, lasting some 300 radiocarbon years (with potentially earlier structures unexcavated). A post-medieval blackhouse of characteristic Lewisian form had been cut into the settlement mound. The three dates from Newtonferry suggest that some Early Medieval activity took place at the site, while the bulk of the deposits date from the thirteenth-fourteenth centuries AD. At South Glendale, the radiocarbon dates indicate occupation sometime between the thirteenth and fifteenth centuries AD; stratigraphically lower, fragmented and truncated remains were prehistoric, probably early Bronze Age.

Bronze Age farms and Iron Age farm mounds of the Outer Hebrides

Hebridean sites of the coastal sand cliffs and associated machair, or sandy plain have been known for many years. Artefacts and ecofacts of various types have long been collected from archaeological sites in the eroding sand-cliffs of the machairs of the Outer Hebrides. Early in 1983, personnel of the then Central Excavation Unit of Historic Scotland's predecessor revisited very nearly all of the coastal archaeological sites then known in the Long Isle, with the specific task of identifying those at immediate threat from coastal erosion and of assessing the feasibility of their excavation or preservation. Some 32 sites were seen to be undergoing active erosion; at nine of them preservation was not being pursued and excavation was feasible. These sites were of two morphotypes: sites exposed in roughly vertical sand-cliffs and sites exposed over relatively large horzontal areas of sand deflation. It was decided to examine one sand-cliff site along its exposed face. The site selected was Balelone in North Uist, its excavation designed to explore both the problems associated with the excavation of deep midden sites with complex stratigraphy and the not-inconsiderable problems of excavation in sand. In the light of the Balelone trial excavation, a new approach was called for. A structured approach aimed firstly at establishing the three-dimensional extent of the sites to be examined. Four sites were then sampled in locations at Baleshare (NGR: NF 776 615), Hornish Point (NGR: NF 758 472), South Glendale (NGR: NF 798 143) and Newtonferry (NGR: NF 89511 78288) within a rigorously-defined research framework.

Coastal sites and severe weather in Cape Range peninsula, northwest Australia

AbstractThe occurrence of Tropical Cyclone Vance, which entered the Exmouth Gulf on March 22 1999, presented an opportunity to study in detail the effects of extreme storm conditions on coastal sites in northern Cape Range peninsula. A post‐cyclone survey of all sites in the study area was undertaken in July 1999, four months after the cyclone struck and aimed to quantify and characterise the effects of a single extreme cyclonic event on coastal archaeological sites. This paper presents the results of this survey and implications for studying coastal archaeological sites in Australia.

Depletion of a resource? The impact of prehistoric human foraging on intertidal mollusc communities and its significance for human settlement, mobility and dispersal

Ethnoecological studies have demonstrated the impacts that even relatively small-scale human foraging has on targeted species of shellfish and the structure of biological communities in intertidal zones. There is compelling archaeological evidence that people in various parts of the world often had a depleting effect on shellfish populations. Shellfish and other marine resources have sometimes been perceived as lowly ranked foods and coastal archaeological sites have often been interpreted as temporary (possibly seasonal) sites for the exploitation of these 'inferior' food resources. This model has been challenged by studies of mid-Holocene Mesolithic hunter-gatherer sites in Atlantic Europe, which have shown that marine foods were the main component of the total diet and that human foraging can deplete shellfish resources. Although subsistence systems based on coastal resources might have been both viable and acceptable in dietary terms, regular mobility would have been necessary for them to be sustainable. On longer time scales, such coastal mobility might result in population dispersal. Sites associated with early anatomically modern humans show the antiquity of coastal adaptations, including the consumption of shellfish, and the dispersal of early modern humans out of Africa into south-east Asia and 'Greater Australia' could have been through coastal environments. This coastal dispersal could have been driven, at least in part, by the impact of early human foragers on intertidal food resources. Resource depletion in coastal zones was probably among the first significant, but small-scale, 'ecological impacts' of human beings.

Fish Processing During the Early Holocene: A Taphonomic Case Study from Coastal Israel

Study of fish bones recovered from coastal archaeological sites requires careful taphonomic analysis in order to determine whether the fish bone assemblage is naturally or culturally derived, and how fish may have been processed by humans. We analysed a grey triggerfish (Balistes carolinensis) assemblage from Atlit-Yam, a submerged Pre-Pottery Neolithic site (8140–7550bp) off the Mediterranean coast of Israel, using multiple taphonomic criteria and quantitative analyses. The clumped distribution of remains, the high bone scatter frequency, the presence of a few burnt bones, the bones' state of fragmentation, the absence of a correlation between bone density and bone frequency, the low species diversity and wide range of body sizes represented, all point to a culturally derived assemblage. The high percentage of identifiable elements, the occurrence of most skeletal elements, and the virtual absence of branchial region bones, are compatible with fish gutted for immediate or later consumption, and incompatible with the expected of refuse. Cranial bones and first dorsal spines of large individuals were missing, apparently a result of size-dependent butchering methods. The emergent picture is of a pile of fish gutted and processed in a size-dependent manner, and then stored for future consumption or trade. This scenario suggests that technology for fish storage was already available, and that the Atlit-Yam inhabitants could enjoy the economic stability resulting from food storage and trade with mainland sites.

Holocene changes in the ecology of northern fur seals: insights from stable isotopes and archaeofauna.

The remains of northern fur seals (Callorhinus ursinus) are among the most abundant of pinniped elements recovered from mainland coastal archaeological sites in both California and Oregon. This is surprising as all contemporary northern fur seals breed exclusively on offshore islands, primarily at high latitudes, and the species is otherwise pelagic. The vulnerability of these animals to human predation suggests that either humans were foraging much further offshore than has been presumed or alternatively that the ecology of these animals has shifted during the late Holocene. We used isotopic and archaeofaunal analysis of the remains of pinnipeds from the middle to late Holocene of central and northern California to clarify the breeding and foraging behavior, and migration patterns of these ancient animals. The carbon and nitrogen isotope compositions of ancient northern fur seals reveal that these animals fed as far offshore as they do today, and that they remained at middle latitudes throughout the year. From an archaeological site at Moss Landing, California, we identified 16 skeletal elements from at least 12 very small northern fur seal pups. From another site near Mendocino, California, we identified the remains of at least 6 pups. We estimate the size and age of 5 of the young animals using sex-specific regressions of body length on the short dentary length derived from measurements of modern specimens. Our estimates indicate these ancient pups were substantially smaller, and therefore younger, than modern 3-month-old northern fur seal pups from similar latitudes and their nitrogen isotope compositions suggest they had not been weaned. As present-day northern fur seals do not leave their rookeries until they are at least 4months old, we consider it highly unlikely that these ancient pups swam to these mainland locations from some distant island rookery. While there are numerous nearshore rocky outcrops along the Mendocino Coast, which may have supported small breeding colonies, the Moss Landing site is centered on a 40-km-long sandy beach, and is more than 120km from what at the time were the nearest offshore islands. We conclude that northern fur seal adult females, subadults, and pups whose remains were recovered at the Moss Landing archaeological site must have been taken at a mainland rookery. Evidence that northern fur seals once bred on the mainland at this central California location suggests that the abundant remains of these animals at numerous other archaeological sites along the California coast also reflect the presence of nearby mainland rookeries. Based on the relative abundance of their remains in ancient human occupation sites and the widespread distribution of sites where their remains have been found, it appears that northern fur seals were once the predominant pinniped throughout a region where they now only rarely occur. Furthermore, their presence along the central and northern California coasts appears to have once severely limited the distribution of other pinnipeds, which are now common to the region.

A Critique of Faunal Analysis; Inconsistency among Experts in Blind Tests

Fish faunal specialists with doctoral degrees independently evaluated samples of fish bones, teeth, and scales from a coastal archaeological site in San Luis Obispo County, California (CA-SLO-165). The considerable variation in interpretation raises serious questions regarding the accuracy of reporting and the usefulness of the data generated. Little agreement at the species level, wide differences in the total numbers of specimens in a given taxon, apparently inaccurate identifications, placements of specimens in excessively specific or overly general categories were typical inconsistencies. Recommendations for minimizing problems include having faunal work done by a specialist with biological knowledge of the specific animal group, and geographic region, identifying the reference collection used in the evaluation, stipulation of the criteria used for distinguishing similar species, and the location of the storage facility for the sample. Second opinions should be solicited and unreviewed data appearing in the “grey literature” should not be cited. A vigorous review process, rather than the reader, should select for credible information.

Weighing and Counting Shell: A Response to Glassow and Claassen

Glassow discusses several "problems" with the use of minimum number of individuals (MNI) in archaeological shellfish analysis, including the difficulty of identifying non-repetitive elements (NRE) to species level for several taxa. However, these problems, especially fragmentation, are more critical for the weight method than for MNI estimates. We have successfully identified thousands of NRE for all species common in southern California coastal archaeological sites. We also suggest that a measure, such as MNI, that provides estimates of numbers of individuals is a more reliable and valid measure with which to address most research questions. The weight method only provides a measure of the weight of some of the fragments from the shells of those individuals.

The application of ground-penetrating radar to a coastal prehistoric archaeological site, Cape Henlopen, Delaware, USA

Cape Henlopen, Delaware is a coastal spit complex located at the confluence of Delaware Bay and the Atlantic Ocean. This region was occupied by prehistoric peoples throughout the evolution of ancestral Cape Henlopen. A ground-penetrating radar (GPR) survey was conducted at one of the prehistoric archaeological sites (7S-D-30B) located within the Cape Henlopen Archaeological District. The site was in a remote location in the center of a tide dominated back-barrier marsh. Ground-penetrating radar waves penetrated to depths of 7 m, and four major sets of reflections were observed. Three sets were interpreted to be GPR images of geomorphic units associated with the spit complex, and the fourth was identified as the GPR image of a shell midden deposit. The GPR survey was used to determine the approximate dimensions of the shell midden, including its depth below ground surface (up to 2.1 m) and horzontal extent (∼250 m2), and to establish the paleoenvironmental setting and antecedent topography of the site prior to occupation. The GPR data suggests that the shell midden was initially deposited upon an aeolian dune surface and the antecedent topography at the site included an up to 1 m deep trough located 5 m to the north of, and trending parallel to, the axis of a present-day topographic high. This survey illustrates that GPR is a useful, noninvasive, tool that may be implemented at archaeological sites in coastal areas. It provides constraints on the environmental setting and topography of the terrain which prehistoric peoples inhabited, and it can be used in planning excavations at sites in coastal geomorphic settings. © 2000 John Wiley & Sons, Inc.

Late Holocene Sea Temperatures along the Central California Coast

Mussel shells from central California coastal archaeological sites record changes in sea surface temperatures in the past 2000 years. Water temperatures, inferred from oxygen isotopes in the shells, were about 1°C cooler than present and stable between 2000 and 700 yr ago. Between about 700 and 500 yr ago, seasonal variation was greater than present, with extremes above and below historic levels. Water temperatures were 2–3°C cooler than today 500–300 yr ago. The interval of variable sea temperatures 700–500 yr ago partially coincided with an interval of drought throughout central California. A coincident disruption in human settlement along the coast suggests movements of people related to declining water sources. Quantities of fish bone in central coast middens dating to this same period are high relative to other periods, and the remains of northern anchovies, a species sensitive to changing oceanographic conditions, are also abundant. The continued use of local fisheries suggests that changes in settlement and diet were influenced more by drought than by a decrease in marine productivity, as fish provided a staple during an interval of low terrestrial productivity.

Upper Holocene sea-level changes: Paleogeographic evolution and its impact on coastal archaeological sites and monuments

The paper presents the evolution of the geographic environment imposed by sea-level changes in selected sites of the Aegean Sea region during the Upper Holocene. The changes are due, mainly, to paroxysmic phases of the actual neotectonic evolution and to differential—in time and space—block movements, and emerged or submerged coasts. The reconstitution of these coasts is presented and, in some cases, natural harbor morphology is revealed. The use and evolution of these sites is discussed. Other sites concern coastal or inland ancient settlements or constructions affected by submersion by the sea, by the rise of the groundwater table, or by uplift movements. A general discussion on engineering measures to be applied for protection of the antiquities affected by these geographic changes closes the presentation.

Cupreous metal corrosion at a Bronze Age coastal marine archaeological site: a study of site processes at Tel Nami, Israel

L'analyse des artefacts de bronze de Tel Nami a permis de distinguer les traces de corrosion dues a l'eau de la mer au micro environnement

Cupreous metal corrosion at a Bronze Age coastal marine archaeological site: a study of site processes at Tel Nami, Israel

Cupreous metal corrosion at a Bronze Age coastal marine archaeological site: a study of site processes at Tel Nami, Israel

Sourcing Busycon Artifacts of the Eastern United States

A review of the history of marine-shell chemical-sourcing efforts preceeds the introduction of this project. Atomic-absorption spectroscopy (AAS) was used to assay levels of Ca, Mg, Fe, and Sr, in 44 prehistoric Busycon carica and Busycon perversum specimens from the eastern United States. Control shells (35) were collected from food refuse in coastal archaeological sites from Long Island to the Mexico—United States border. Subject shells came from nine Archaic and Mississippian sites. Elemental ratios were clustered to derive a probable water-body origin for the nine artifacts. The influence of diagenesis, body part, and species was negligible, but geography heavily influenced the results. The three shells from Monks Mound indicated origin in tropical, eastern Gulf, and Atlantic water. The shells from the Indian Knoll, Mulberry, and Tatham sites appear to have originated in eastern Gulf waters. The shell from the Archaic-period Ward site seems to have come from tropical water.