New insights about the construction and use of shell mounds from the geochemical analysis of mollusks: an example from the greater San Francisco Bay |
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| Authors: | Kari M Finstad B Lynn Ingram Peter Schweikhardt Kent G Lightfoot Edward M Luby George R Coles |
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| Institution: | 1. Division of Ecosystem Science, ESPM, 137 Mulford Hall #3114, University of California, Berkeley, CA 94720, USA;2. Department of Earth and Planetary Science, University of California, Berkeley, CA 94720, USA;3. Department of Geography, College of Alameda, Alameda, CA 94501, USA;4. Department of Anthropology, University of California, Berkeley, CA 94720, USA;5. Museum Studies Program, San Francisco State University, CA 94132, USA;6. Point Richmond, CA 94801, USA |
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| Abstract: | A new method developed by Schweikhardt et al. (2011) for the geochemical analysis of bay mussels is applicable (when combined with radiocarbon assessments) for examining the seasonal construction patterns and growth cycles of coastal mound sites over time. Ideally suited for the analysis of mollusk fragments in museum collections, this method allows archaeologists to evaluate divergent models about the functions of mound sites, as well as the mobility practices and social organizations of the mound builders. In this case study, the method is employed to examine two adjacent mounds (Ellis Landing, Brooks Island) in the San Francisco Bay Area, California to assess whether their occupants may have participated in a broader multi-site community dating to the Late Period (1100–250 BP). |
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| Keywords: | Shell mound clusters Multi-site communities San Francisco Bay Area Stable isotope analysis Mg/Ca ratios Seasonal harvesting of bay mussels |
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