Holocene climate and seasonality of shell collection at the Dundas Islands Group, northern British Columbia, Canada—A bivalve sclerochronological approach

To analyze environmental changes and the seasonality of shell collection in British Columbia during the Holocene, oxygen isotopes were measured from modern and archeological (1337–7438calyr BP) shells of the butter clam Saxidomus gigantea. 1697 discrete isotope samples were taken from two modern and 27 archeological shells with a high temporal resolution (sub-seasonal up to daily). Archeological shells were collected from five shell midden …