Sampling Cerros' Demise: A Radiometric Check on the Elusive Protoclassic

Results

CCADP samples were processed by Beta Analytic, Inc., www.radiocarbon.com. Calibrations were calculated using the newest calibration database (Struiver et al. 1998; Talma and Vogel 1993), and C13/C12 ratios were calculated. Results are reported in terms of conventional radiocarbon age, with single or multiple y-intercepts, and 1-Sigma and 2-Sigma ranges (Figure 7). SMU dates were calibrated by Beta Analytic using the same standard, however, no C13/C12 ratio was available; this value was estimated in the calculation. While minor differences may result, recalibration on the same standard dramatically improves comparability between the two data sets. Some recalibrations have led to reinterpretation.

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