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Compilation, Calibration, And Synthesis Of Faunal And Floral Radiocarbon Dates, Rancho La Brea, California, F. O’Keefe, Elizabeth Fet, John Harris
Compilation, Calibration, And Synthesis Of Faunal And Floral Radiocarbon Dates, Rancho La Brea, California, F. O’Keefe, Elizabeth Fet, John Harris
F. Robin O’Keefe
This paper presents a compilation and synthesis of calibrated radiocarbon dates for the Rancho La Brea tar pits, Los Angeles, California. A literature survey yielded 188 dates, and 21 additional dates are presented here for the first time. These range in age from 185 to 50,000 radiocarbon years. Dating of Rancho La Brea fossils has been uneven; only from Pits 91 and 2051 have more than 30 dates been obtained. The depositional history of well-sampled pits was complex, with one or more episodes of major accumulation interspersed with lower background levels of entrapment. The most significant quantifiable source of error …