Midden Sites Research Articles

A dual bivalve approach for interpreting past sea surface temperatures and seasonality from shell midden sites using oxygen isotope sclerochronology

Stable oxygen isotope (δ18O) analysis of archaeological shellfish remains combined with sclerochronology can be used to precisely reconstruct past sea surface temperature (pSST), season(s) of shellfish collection, and thus the season(s) of archaeological site occupation. Our study tests if δ18Oshell and sclerochronological analyses of marine bivalve species Leukoma staminea – with previously unassessed seasonality and pSST potential – can provide additional insights not captured by the better studied species, Saxidmous gigantea in British Columbia (BC, Canada). We analyzed live-collected L. staminea and S. gigantea shells from Sechelt, BC, and compared results to archaeological shell data from Powell River, BC, in the territory of the Tla'amin First Nation (1065 to 797 cal. B.P.). The seasonality of shellfish harvest differed between species, with S. gigantea preferentially collected in the spring, whereas L. staminea collected year-round. This highlights that sole-species seasonality studies may miss important variability harvesting strategies. Additionally, comparisons between instrumental (5.7 to 20.4 °C) and reconstructed SST from modern L. staminea δ18Oshell (5.6 to 18.4 °C) showed good agreement in annual range. Our results indicate that archaeological S. gigantea record a wider range of pSST (−1.6 to 22.9 °C) than archaeological L. staminea (5.8 to 25.9 °C), suggesting that S. gigantea may be a more sensitive palaeotemperature recorder. Further, we found that using the same reconstructed δ18Owater value for both species in pSST reconstruction caused an overestimation of temperature. Accordingly, we argue that it is critical to calibrate the equation with corresponding species-specific δ18Oshell values, regardless of both having aragonite mineral structures. Our study highlights the potential of L. staminea to broaden seasonality interpretations while clarifying that its use for pSST reconstruction may not capture the lower range of temperature.

Preliminary investigation of the local marine reservoir effect in port JOLI harbour, NOVA scotia using archaeological M. arenaria shells

Port Joli Harbour, situated on the southwest coast of the maritime province of Nova Scotia, Canada, has the highest density of shell midden deposits in Atlantic Canada. The terrestrial radiocarbon chronology points to continuous human occupation of the harbour from 1685 cal yr BP to 250 cal yr BP. Despite the abundance of the soft-shell clams Mya arenaria at shell midden sites throughout the harbour they have not been incorporated into the chronology, nor have they been used to study the local marine reservoir effect in the harbour. We report 12 new 14C measurements on archived Mya arenaria from the same depositional contexts as previously dated charcoal and terrestrial mammal bone samples from two shell middens in Port Joli Harbour. From these shell-charcoal and shell-bone pairs, we present preliminary calculations of local marine reservoir corrections (ΔR) for the harbour. The ΔR values are highly variable and are overall more positive than the pre-bomb values reported for the Scotian Shelf. The variability of these values highlights the challenges in calculating ΔR values from archived archaeological samples but also the opportunities to include high-resolution analysis of ΔR variations in discussions on human-environment interactions in coastal settings during the late Holocene. We suggest that the chondrophore may be more favourable for calculating first order estimates of ΔR to be used in future archaeological calibrations, while high resolution analysis of the ventral margin region is useful for climate reconstructions. We recommend that more 14C measurements from M. arenaria shells be obtained from either distinct features or rapidly deposited middens in Port Joli Harbour. A suite of temporally and geographically precise ΔR values for the harbour will not only allow for the study of middens that are at risk of coastal erosion and lack charcoal for 14C dating but will also allow for the reconstruction of past climate conditions and refine our understanding of late Holocene human-environment interactions in the North Atlantic.

Sustaining the shell middens: A coastal vulnerability assessment of shell midden sites within the Nansemond River tributary

Shorelines have always been hubs of human activity and development meaning much of our cultural heritage is concentrated in coastal settings. In recent decades, changing environmental conditions and the effects of global warming (i.e., shoreline erosion, sea-level rise, land subsistence) threaten to destroy much of our remaining global coastal heritage. To prevent the further loss of archaeological contexts, this study seeks to develop a coastal vulnerability index through geospatial analysis to assess the vulnerability of 35 precontact shell midden sites along the Nansemond River in Suffolk, Virginia. The Nansemond middens offer a long-term history of how coastal inhabitants interacted with their surrounding landscape, with occupation of the area ranging from the Early Archaic period through European contact. This research considers various environmental and cultural variables used to determine which archaeological sites are most threatened by environmental changes and have the greatest potential to contribute valuable data to understand the past.

Beyond hinges and spires: A critical examination of archaeomalacological quantification methodologies using coral reef molluscan assemblages from Jiigurru (Lizard Island Group), northern Great Barrier Reef

Quantification, as one of the pillars of the zooarchaeological subdiscipline, is an invaluable component of the toolkit researchers use to study past people-animal interactions. Despite being the subject of rigorous (zoo)archaeological debate, the calculation of Minimum Number of Individuals (MNI) values remains one of the main methods of quantifying the relative abundance of taxa within faunal assemblages. Choosing the appropriate quantification protocol to calculate the MNI of archaeological invertebrate assemblages can be challenging due to regional taxonomic considerations and the myriad of quantification methodologies and frameworks available in the global archaeomalacological literature. In an Australian context, methodologies for quantifying coral reef molluscan assemblages have not been explicitly evaluated. Using archaeological molluscan assemblages from two midden sites (Freshwater Bay Midden and Mangrove Beach Headland Midden) on the northern Great Barrier Reef island group of Jiigurru (the Lizard Island Group), we critically examine two commonly adopted archaeomalacological quantification methodologies: the NRE MNI and tMNI protocols. The NRE MNI methodology uses one to two non-repetitive elements (NREs) of molluscs, whilst the tMNI protocol includes a wider range of elements akin to vertebrate MNI quantification methodologies. Through a comparison of taxa abundances and statistical analyses, results show that the tMNI protocol, with some modification, is best suited for the Jiigurru assemblages. Higher MNI values and an increased assemblage diversity, evenness, and richness were recorded for the molluscan assemblages at both midden sites when the tMNI protocol was applied. This study foregrounds the importance of data transparency when reporting quantification protocols and outcomes to ensure the highest degree of data quality, replicability, and usability.

A microCT assessment of archaeological parenchyma from three riverine shell middens dating to the early Holocene, Yongjiang River Basin, Guangxi, southern China

Archaeobotanical investigations at three riverine shell midden sites dating to the early Holocene – Baozitou, Shichuantou and Nabeizui – in the Yongjiang River Basin, Guangxi, southern China have identified charred fragments of archaeological parenchyma. A subset of the archaeological parenchyma was assessed using X-ray micro-computed tomography (microCT), which enabled virtual histological examination of the interior of parenchyma fragments. The microCT scanning identified a fragment of lotus root (Nelumbo nucifera), a possible immature fig fruit (poss. Ficus sp.), cooked food fragments, and less diagnostic elements, some of which derive from underground storage organs (USOs), including a bud/bulb and potentially an aroid. The fragment of lotus root from Nabeizui was directly radiocarbon dated using Accelerator Mass Spectrometry to 8770–8544 cal BP. A new AMS radiocarbon chronology based on Canarium nutshells for the three sites indicates that they were all used during the early Holocene. These findings contribute to the understanding of broad spectrum plant use by hunter-gatherer-fisher communities in southern China during the early Holocene, as well as showing the potential of microCT imaging for the analysis of archaeological parenchyma from this region.

Farming and feasting during the Bronze Age–Iron Age transition in Britain (ca. 900–500 bce): multi-isotope evidence for societal change

The Late Bronze Age saw the rise of a new site type in southern Britain, commonly termed a midden. These vast monumental mounds, some comprising tens of thousands of artefacts/ecofacts dominated by animal bone and ceramics, signal a societal refocus towards agricultural intensification and communal feasting on a grand scale. These sites point to agricultural produce being the mainstay of the economy, with bronze having a reduced social and economic importance. This likely created new regimes of managing landscapes and livestock and new networks and agricultural catchments anchored on the sites. Major questions remain surrounding the strategies employed to enhance agricultural productivity, how landscapes and livestock were managed, and how different sites and regions met these challenges at a time of climatic deterioration. This article employs multi-isotope analyses on domestic and wild fauna to address these questions. It presents carbon, nitrogen, and sulfur (δ13C, δ15N, and δ34S, respectively) isotope analyses on 235 animals from 6 midden sites in 2 major regions of midden accumulation: the Vale of Pewsey in Wiltshire and the Thames Valley. The results demonstrate distinct differences in approaches to maximising agricultural productivity, with varied strategies apparent at a site, species, and regional level. Some sites, such as Potterne and Runnymede, clearly drew domestic fauna from a wide catchment where wide-ranging management and foddering regimes were employed. Other sites, such as East Chisenbury, had a more restricted catchment but a tightly controlled, intensive management regime. These data provide new insights into regional responses to the reorganisation of the economy, landscape use, and developing agricultural networks during the Bronze Age–Iron Age transition in Britain, revealing dynamic and evolving societal change.

From Forests to the Coast - Multidisciplinary Investigation of Human Adaptations at the Mini-athiliya Shell Midden, Sri Lanka

Over the last three decades, Sri Lanka has risen to international prominence as a key area for exploring past forager adaptations. Much of this discussion has focused on the lowland rainforests of the Wet Zone of the island, and their preservation of the earliest fossils of our species, bone tools, and microlithic technologies in the region ca. 45,000 years ago. It has been recognized that the northern and southern coasts of Sri Lanka represent crucial locales for studying human occupation and adaptation through the Pleistocene and Holocene. Here, we revisit the important shell midden site of Mini-athiliya (dating to ca. 4,000 cal. years BP), on the southern coast of Sri Lanka, which has yielded human remains alongside microlithic stone tools and animal remains. We present a comparative analysis of body size variation of the human remains belonging to the HMA 6 adult skeleton from Mini-athiliya with a wider database of foragers to investigate local adaptations. We also apply stable carbon and oxygen isotope analysis to the tooth enamel of four other individuals documented at Mini-athiliya in order to determine their dietary reliance on forest, grassland, or coastal resources. Together, our results highlight that, rather than a clear distinction between earlier forest adaptations and later coastal specialisation, the Mini-athiliya individuals provide evidence for a plastic spectrum of ecological adaptation. We argue for continued research on how human populations in different parts of the island interacted and adapted to its diverse tropical settings across space and time.

The Excavation of a Neolithic site at Jingtoushan in Yuyao, Zhejiang

Abstract The Zhejiang Provincial Institute of Cultural Relics and Archaeology and other authorities excavated the Jingtoushan site from 2019 to 2020, revealing various features such as ash pits, storage pits, red burnt soils, shell middens, and the loci of tool manufacture. Unearthed artifacts are made of pottery, stone, bone and antler, mussel, wood, and textile. In addition, a large number of faunal, floral, and minerals are also collected. The Jingtoushan site, dating between 8300 and 7800 BP, is the only prehistoric shell midden site discovered thus far in Zhejiang. It also has the oldest and deepest shell midden deposits along the coastal areas of China.

Use of micro-analysis to augment the macro-archaeological investigation of an elevated Holocene shell midden, Dampier Archipelago, NW Australia

Few studies in Australia have employed automated mineral techniques to augment archaeological site investigations, and there are no known published micromorphological studies of Australian shell midden sites. This pilot study presents results of a micro-analytical investigation of a Tegillarca granosa (formerly known as Anadara granosa) midden in the Old Geos site, located in an elevated location on the Burrup Peninsula in NW Australia. Analytical investigations were undertaken on a 15 cm profile in the upper section dated to 1,500 cal yr BP of a 50 cm excavation profile that has a maximum age estimate of around 7,000 cal yr BP. Although invertebrate activity has reduced the temporal and spatial resolution, mineralogical analyses differentiate a higher relative concentration of alkali feldspars in the top of the sampled profile consistent with freshly weathered granophyre bedrock, as well as presence of rare rutilitic quartz. The profile otherwise shows sediment source and transport has remained constant. In addition to the shell, cultural material includes fish, mammal and possibly avian bone, some of which have been burnt. Plant material is limited but does include micro-fragments of charcoal and phytoliths from grass and wood. Fungal tissue is further evidence of present or past degrading organic matter. Both this, and a previous micro-analytical study on the more distant site of Barrow Island, highlight how micro-analytical investigation can provide more detail on depositional and post-depositional history of midden and other archaeological records in this region.

Wunjunga midden: Late Holocene change, site preservation and open midden sites on the Central Queensland Coast

This paper presents excavation results from a midden site on the central Queensland coast at Wunjunga, dating to 1,500 BP, and examines the implications for Late Holocene coastal occupation and open site preservation. We propose that although there is clear evidence for environmental factors such as cyclonic events having heavily impacted open midden sites in the region in the Late Holocene, the apparent proliferation of post-500 BP sites in this part of the central coast is not solely a signature of a post-cyclonic landscape but may also be linked to broader socio-cultural changes.

Assessing the morphological impacts of long-term harvesting in intertidal gastropods using historical data and morphometric tools

ABSTRACTSize-selective harvesting of intertidal molluscs is a common practice. However, the effects of long-term traditional harvesting remain unclear. Changes in mean shell size are generally taken as evidence of changes in harvesting intensity. However, mean shell size is also influenced by environmental pressures, which may confound the analysis of size variation over time. In this study, we apply geometric morphometrics to historical data from two shell middens, in an attempt to classify Littorina littorea shells to their environmental origins, prior to carrying out shell size analysis. Using this method, shell shape was found to be consistent within and between the midden sites. Based on comparison with modern populations from shores of known wave exposure, the midden shells were found to be more consistent with sheltered shores, and to differ most from the very exposed shore sites, the latter of which are located adjacent to the midden remains. The mean shell size was significantly smaller in the more recent midden site. We hypothesize this reduction is caused by an increase in harvesting intensity over this period. It is also possible, given the very slight reduction in shell size, coupled with certain life-history traits of L. littorea, that the change in shell size was caused by slight differences in environmental conditions. The use of midden shells and morphometrics has the potential to provide an insight into previous environmental conditions and past harvesting practices, which may be used to inform current harvesting practices.

The Life History of Coffee-Related Pottery Traditions in Ethiopia: Ethnoarchaeology and Formation Processes of the Archaeological Record

ABSTRACT Coffea arabica, the most widely consumed variety of coffee globally, is the Ethiopian domesticate par excellence. Ironically, archaeological research on the early cultivation and consumption of this plant in its place of origin is sparse. This ethnoarchaeological study among Kafecho, Majangir, and Oromo coffee-producing communities in southwest Ethiopia examines the processes by which coffee-related pottery moves from systemic to archaeological contexts. Two traditions of brewing coffee are associated with two different pottery assemblages. Variation in the life history of coffee-related pottery across households is attributed to (1) differences in breakage patterns that either enable or inhibit secondary use and (2) household economic status, which determines when pottery is replaced. The use, reuse, and discard of coffee-related pottery is high in coffee-producing communities, and the possibility of recovering such remains archaeologically is high in midden sites where secondary refuse is discarded and in abandoned settlements as primary refuse where breakage occurs.

The tempest: Geoarchaeological examinations of tropical cycle/hurricane signatures in a submerged, formerly coastal shell midden site, Econfina Channel, Florida, U.S.A.

The nature of preservation potential for submerged cultural landscapes on continental shelves remains varied and not easily defined. This is due to two factors: First, relatively few sites have been discovered offshore, creating a small sample size. Second, excavation and analysis of such submerged sites have only begun to mature during the past few decades. We present here results from an exploratory study of one such site that examines impacts from two tropical cyclone systems in successive years. The main feature of this site is a specific type of archaeological feature: a shell midden. These sites are excellent indicators for coastal occupations globally and can retain evidence for major developments in cultural evolution, including reactions to climate change and sea-level rise from the Pleistocene into the Holocene. Further, they are found worldwide. The degree to which middens have been impacted by past and present marine forces, including tropical cyclones, is a key factor in their potential to preserve such evidence. We used a geoarchaeological methodology that quantifies particle size fractions from sediments taken from various zones within the site to compare them before and after each storm. Results have significant implications for preservation of submerged, formerly coastal archaeological sites globally.

Coupled archaeological and ecological analyses reveal ancient cultivation and land use in Nuchatlaht (Nuu-chah-nulth) territories, Pacific Northwest

Indigenous peoples’ legacies of plant cultivation and management can have profound effects on contemporary forest structure and species composition long after cultivation has ceased. Despite rich ethnographic accounts of practices like orcharding and fruit tree management in the Pacific Northwest, archaeological and ecological research documenting these practises have been lacking. To investigate ancient and historical land-use and cultivation in Nuchatlaht (Nuu-chah-nulth) territory, we undertook a multidisciplinary study combining archaeological surveys on Nootka Island and ecological analyses of seven anomalous plant communities found adjacent to former village sites. Fifty-seven archaeological sites were inventoried, and 16 previously recorded sites were updated, including six notable village sites. Intensive botanical surveys were subject to indicator species analysis, NMDS, and ANOSIM analysis, which suggest that three putative orchard sites were highly enriched for culturally important and edible fruit and root plants, such as Pacific crabapple (Malus fusca), saskatoon berry (Amelanchier alnifolia), salmonberry (Rubus spectabilis), and wild rice root (Fritillaria camschatcensis), and are highly distinctive compared to nearby sites and regional floristic patterns. Four shell midden sites were characterized by plant communities distinct from both orchard sites and control sites. Our archaeological and ecological analyses, alongside ethnohistorical data, strongly suggest a pattern of ancient and/or historical cultural landscape modification by Nuchatlaht peoples to produce food-bearing plant communities in their territories. This compliments findings in other literature, and what Indigenous peoples have long told researchers, that plant resources were routinely encouraged and harvested across their inhabited landscapes.

Midden site selection in Dorcas gazelle: Larger is not always better.

Dorcas gazelles are believed to use middens to mark their territories and transmit information. Given the commitment to maintaining a midden, it is believed that middens are not placed randomly. We examined how the habitat (tree height and maximum canopy) and anthropogenic disturbance (camel and human presence) influenced the selection of midden sites by Dorcas gazelles in South Sinai, Egypt. Our results showed that Dorcas gazelles did not place middens at larger trees, while favoring relatively smaller trees and shrubs where the anthropogenic disturbance and perceived hunting risk are less. Our results, in light of the previous findings, suggest that selection of midden sites is species context‐dependent behavior. In areas with less anthropogenic disturbance and hunting, Dorcas gazelles have been shown to select the largest trees of the same species as midden sites. In contract, in our study site with high anthropogenic disturbance and no protection from hunting, gazelles did not utilize the presumably optimum landmarks for midden sites. Our study showed that Dorcas gazelles instead utilized smaller trees and some shrubs that are less conspicuous and presumably less effective as advertisement sites, but safer.

NEW MARINE RESERVOIR CORRECTION VALUES (ΔR) APPLICABLE TO DATES ON NEOLITHIC SHELLS FROM THE SOUTH COAST OF KOREA

ABSTRACTShells from Neolithic shell midden sites have been routinely dated in Korea, but they have not been calibrated based on the correction values (ΔR) for the marine reservoir effect (MRE). A lack of proper calibration has left dates on shells incomparable to those on terrestrial samples, and thus unusable in building the chronological sequence of shell middens. Here, we report the two new ΔR values of a pre-bomb (pre-1950) blue mussel from the south coast. We applied the two new and the two previously reported ΔR values to the three dates on marine shells from the Bibongri shell midden in southeastern Korea. Our ΔR adjusted calibration and the comparison to dates on charcoal and bone remains clarify an ambiguity in the stratigraphy and the Early Neolithic chronology at Bibongri. Our contribution is to provide the ΔR values that can be further applied to other Neolithic shell middens along the south coast.

Morphometric and stable isotope analysis of archaeological Totoaba macdonaldi otoliths, Baja California, México

Shell midden sites along the upper Gulf coast of Baja California contain abundant evidence of Indigenous subsistence practices and land use strategies reflecting the long history of local fisheries. Many of these sites contain well preserved faunal remains indicating people utilized a variety of littoral and marine habitats and exploited seasonal runs of the now endangered totoaba (Totoaba macdonaldi). We analyze totoaba otoliths recovered from eight archaeological sites along the upper Gulf coast with adjusted accelerated mass spectrometry (AMS) radiocarbon date ranges spanning ~5700 to 125 cal BP. Integrating geochemical, biological, oceanographic, and archaeological datasets, this study investigates ~5700 years of Indigenous fishing practices and past marine environments by examining totoaba biogeography, population dynamics, season of harvest, and changes in water chemistry. Otolith morphometrics indicate that most (~78%) of the Indigenous catch consisted of yearlings and juveniles, reflecting more sustainable practices than commercial fisheries, which target larger, older, and more reproductively viable fish. Stable isotope results reveal slight oscillations in water chemistry between the Middle and Late Holocene and suggest shifts in salinity due to the extensive damming of the Colorado River in the past century. Our results contribute to regional paleoenvironmental reconstructions, the natural history of totoaba, and the growing body of data that suggest many Indigenous people engaged in localized sustainable fishing practices over thousands of years.

福井県鳥浜貝塚から出土した大型植物遺体の14C 年代測定 縄文時代草創期から前期の堆積物層序と土器型式の年代の再検討

福井県鳥浜貝塚から出土した大型植物遺体の14C 年代測定 縄文時代草創期から前期の堆積物層序と土器型式の年代の再検討

Big Fish or Small Fish? Differential Ichthyoarchaeological Representation Revealed by Different Recovery Methods in the Atacama Desert Coast, Northern Chile

ABSTRACT Recovery methods and techniques for archaeological sampling can yield major differences in abundance and anatomo-taxonomical representation of animals, affecting past social and ecological reconstruction. Despite being a common organic material in archaeological sites, faunal remains typically exhibit differential preservation of species and skeletal elements due to pre- and post-depositional processes. This is particularly true for small-sized animals such as certain species of fish, whose often small and fragile fragments are difficult to recover and identify. Here, we present the results of a comparative analysis between two ichthyoarchaeological assemblages from Caleta Vitor 3 in northern Chile (CV3, 18°45′09″ S), an Early to Middle Holocene (9.2–7.6 ka cal BP) Chinchorro shell midden site. We compare samples obtained and processed, both in the field and the lab, using different recovery techniques. We developed a data standardisation procedure to compare and evaluate skeletal representation, taxa distribution and variations throughout the stratigraphic sequence. Our results show that mesh screen size affects not only the abundance and density of fish but also species representation. Moreover, the identification of small pelagic fish at CV3 sheds further light upon prehistoric fishing strategies and social organisation during the site’s early occupation.

Analysis and contextualisation of a Holocene bone point from Murrawong (Glen Lossie), Lower Murray River Gorge, South Australia

This article presents the analysis and preliminary contextualisation of a bone point located during the Lower Murray Archaeological Project excavations in South Australia in 2008. The artefact was recovered from a midden and burial site, Murrawong (Glen Lossie), and was situated in a layer dating to 5303–3875 cal BP. The artefact was the only bone point recovered during the project and is interpreted as an implement likely to have been used for piercing soft materials or possibly as a projectile point. Its chronology and morphology are generally consistent with previous finds in this region. The analysis presented here contributes to our understanding of bone technology in the Lower Murray River Gorge, highlighting areas where more research is required.