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Methodological advancements in geoarchaeology and spatial and chronological modeling are opening new avenues to interpreting large coastal shell-bearing sites. We document the developmental histori...

Archaeologists working in the Salish Sea (Strait of Georgia and Puget Sound) region of the Pacific Northwest have unearthed human burials and non-mortuary features dated to 4000–3500 cal B.P. containing tens and even hundreds of thousands of stone and shell disc beads. Several sites are reported here, including burials recently excavated from site DjRw–14 located in the territory of the shíshálh Nation. We argue that the disc beads constituted an important form of material wealth at this time, based on the amount of labor that would have been required to produce them and the capacity for beads to accrue in value after their production. A model of material wealth-based inequality is developed for a period much older than many archaeologists working in the region have previously thought.

Recent genome-wide studies of both ancient and modern indigenous people of the Americas have shed light on the demographic processes involved during the first peopling. The Pacific northwest coast proves an intriguing focus for these studies due to its association with coastal migration models and genetic ancestral patterns that are difficult to reconcile with modern DNA alone. Here we report the genome-wide sequence of an ancient individual known as “Shuká Káa” (“Man Ahead of Us”) recovered from the On Your Knees Cave (OYKC) in southeastern Alaska (archaeological site 49-PET-408). The human remains date to approximately 10,300 cal years before present (BP). We also analyze low coverage genomes of three more recent individuals from the nearby coast of British Columbia dating from approximately 6075 to 1750 cal years BP. From the resulting time series of genetic data, we show that the Pacific Northwest Coast exhibits genetic continuity for at least the past 10,300 cal BP. We also infer that population structure existed in the late Pleistocene of North America with Shuká Káa on a different ancestral line compared to other North American individuals (i.e., Anzick-1 and Kennewick Man) from the late Pleistocene or early Holocene. Despite regional shifts in mitochondrial DNA haplogroups we conclude from individuals sampled through time that people of the northern Northwest Coast belong to an early genetic lineage that may stem from a late Pleistocene coastal migration into the Americas.Significance StatementThe peopling of the Americas has been examined on the continental level with the aid of single-nucleotide polymorphism arrays, next generation sequencing, and advancements in ancient DNA, all of which have helped elucidate major population movements. Regional paleogenomic studies, however, have received less attention and may reveal a more nuanced demographic history. Here we present genomewide sequences of individuals from the northern Northwest Coast covering a time span of ~10,000 years and show that continental patterns of demography do not necessarily apply on the regional level. In comparison with existing paleogenomic data, we demonstrate that geographically linked population samples from the Northwest Coast exhibit an early ancestral lineage and find that population structure existed among Native North American groups as early as the late Pleistocene.

Bones discovered during lot preparation for a housing development led to the identification of an ancient burial ground in the Nass River valley. The site was excavated as a cooperative venture between the Lakalzap Band Council and the Canadian Museum of Civilization. Fifty-seven human skeletons, along with more than 200 artifacts and nearly 20,000 non-human bones, provide insight into mortuary practices, human biology, palaeopathology, and demography for the 6th through 12th centuries A.D. These findings are analyzed in the context of 5,000 years of British Columbia coastal Indian history.

Disproportionately short metacarpals or metatarsals in eight burial skeletons and three unusually short metapodials recovered as disturbed bones were identified in a 1500 B.C. to A.D. 500 skeletal series from eight archeological sites of the north mainland coast of British Columbia, Canada. At least ten people were affected from four sites for a minimum series frequency of 5.2%. Various factors clinically implicated in the occurrence of brachy-metapody were investigated to account for the anomaly. Context-sensitive information suggested that trauma, infarction or infection, and individual or family-related malformation syndromes were unlikely possibilities. Some modern population data suggest that the series frequency was unusually high, particularly for fourth metatarsal involvement, the most commonly affected bone. Modern pedigree interpretations, ethnohistoric inferences, and the archeological contexts of the affected burial skeletons and site samples provide a framework for concluding that brachymetapody in the series was more likely due to the inheritance of an essentially isolated anomaly.