HOLOCENE CLIMATIC-CHANGE IN THE ZACAPU LAKE BASIN, MICHOACAN - SYNTHESIS OF RESULTS

Following archaeological investigations of the preclassic occupation o f the western part of the Zacapu lake basin, a series of analyses were made from four cores taken along a transect between the centre and th e shore of the former marsh (drained at the beginning of this century) . Eighteen samples were radiocarbon dated yielding ages between 8220+/ -60 years BP and 2170+/-60 years BP(uncalibrated). Here we present a s ummary of the results of the sedimentological, palynological and diato m studies undertaken which indicate changes in the water level in Zaca pu and changes in local climate, taking into account the effects of lo cal volcanic activity. (C) 1997 INQUA/Elsevier Science Ltd.