Physics
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmpp43a..09a&link_type=abstract
American Geophysical Union, Spring Meeting 2007, abstract #PP43A-09
Physics
5420 Impact Phenomena, Cratering (6022, 8136), 6022 Impact Phenomena (5420, 8136), 6240 Meteorites And Tektites (1028, 3662), 6250 Moon (1221), 9350 North America
Scientific paper
AMS radiocarbon dating of a pygmy mammoth (Mammuthus exilis) thoracic vertebra and associated charcoal has provided evidence for the contemporaneity of the pygmy mammoth and early human remains on Santa Rosa Island, Channel Islands National Park, California. Charcoal associated with the vertebra dated 11,010 ±70 RC yr B.P. (B-133594). That date was significantly close to the extinction date for continental mammoths to warrant a date directly on the bone. The vertebral centrum was drilled and submitted for bone collagen dating by Stafford. The resultant date was 11,030 ±50 RC yr. B P (CAMS-71697), only 20 14C years older than the charcoal date. The significance of the dates was immediately apparent, because a date from human remains from the Arlington Springs Site (CA-SRI-173), Santa Rosa Island was 10,960 ±80 RC yr B.P. (CAMS-16810) (Johnson et al., 1999) - a date nearly identical with the M. exilis measurement. The contemporaneity of the mammoth bone date and human bone date indicates that mammoths were still extant on the islands when humans arrived. These data are from only one mammoth and one human ... more research needs to be done on the mammoth and human remains on the island. Was the contemporaneity coincidence, or the prelude to extinction?
Agenbroad L. D.
Johnson Jesse
Morris Dave
Stafford Thomas W.
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