Stable Isotopes from Marine Shells, Ancient Environments, and Human Subsistence on Middle Holocene Santa Rosa Island, California, USA

Autor: Torben C. Rick, John A. Robbins, Kurt M. Ferguson
Rok vydání: 2006
Předmět:
Zdroj: The Journal of Island and Coastal Archaeology. 1:233-254
ISSN: 1556-1828
1556-4894
DOI: 10.1080/15564890600935480
Popis: We report the analysis of stable isotopes on a suite of marine and estuarine shellfish, along with faunal data, from a Middle Holocene red abalone midden (CA-SRI-191) on Santa Rosa Island, California. Our research suggests that people harvested red abalones, mussels, and estuarine shellfish at about 6000 cal BP. Later in time around 4300 cal BP, people relied on California mussel and sea urchin with only trace amounts of red abalone and no estuarine taxa. Analyses of stable oxygen isotopes from California mussel, red and black abalone, and Venus clam shells indicate that a significant change in sea surface temperatures (SST; ∼2°C) between the two occupations is the primary cause for this discrepancy. Differences between the isotopic values of California mussel and black and red abalone shells from the same strata also suggest that people were probably diving in fairly shallow waters for red abalone rather than obtaining them from the intertidal zone. Our research and other studies in the region s...
Databáze: OpenAIRE
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