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December Monthly Meeting

posted Nov 16, 2017, 4:11 AM by MC Prentice
We will hold our next meeting on Tuesday, December 5, 2017, the first Tuesday of the month, at 7:00 p.m. The meeting will be held at the B. Calvin Jones Center for Archaeology at the Governor Martin House. The Center is located off Lafayette Street, between Seminole Drive and Myers Park Drive, at 1001 De Soto Park Drive. We encourage you to bring a holiday snack to share.

Please join us as we welcome Dr. Christopher Moore of the University of South Carolina's Institute of Archaeology and Anthropology who will present "Widespread Platinum Anomaly at the Younger Dryas Boundary: Evidence from North American Sedimentary Sequences."

Previously, a large platinum (Pt) anomaly was reported in the Greenland ice sheet at the Younger Dryas boundary -- 12,800 calibrated years before present (Cal BP). In order to evaluate its geographic extent, fire-assay and inductively coupled plasma mass spectrometry analyses were performed on 11 widely separated archaeological bulk sedimentary sequences. Results indicate a distinct platinum anomaly spread widely across North America and dating to the Younger Dryas onset. The apparent synchroneity of this widespread anomaly is consistent with Greenland ice sheet data that indicate atmospheric input of platinum-rich dust. We expect this anomaly to serve as a widely-distributed time horizon for identification and correlation of the onset of the Younger Dryas climatic episode at 12,800 Cal B.P. This datum will facilitate the dating and correlating of archaeological, paleontological, and paleoenvironmental data between sequences, especially those with limited age control.