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Bayesian Refinement of a Stratified Sequence of Radiometric Dates from Punta De Chimino, Guatemala

2008; Cambridge University Press; Volume: 50; Issue: 1 Linguagem: Inglês

10.1017/s0033822200043356

1945-5755

Bruce R. Bachand,

Geology and Paleoclimatology Research

Bayesian analysis of 6 radiocarbon and 2 luminescence determinations from Punta de Chimino's acropolis provides subcentury chronometric accuracy for a Protoclassic hiatus and a more decisive, incipient Early Classic abandonment. For the latter event, sensitivity tests and a redundant modal value pattern reduce the period of historical interest from a few centuries to several decades. The findings aid in selecting between 2 historical scenarios and demonstrate that improved chronological accuracy is attainable for sites and contexts lacking calendrical dates.