Paleo Slide Set: Climate and the Classic Maya Civilization
Oxygen Isotope record of Punta Laguna and Chichancanab, from Curtis et al. 1997

This slide compares the oxygen isotope record on the same species of gastropod 
between the two lake cores: Punta Laguna (left) and Chichancanab (right). Note 
that the Punta Laguna record is much higher resolution owing to higher sedimentation 
rates than Chichancanab. Within the error of the radiocarbon age models, the period of 
higher mean 18O values in Punta Laguna correlates with the interval of increasing sulfur 
and oxygen isotope values in Chichancanab. 

Photo Credits:
David A. Hodell 
Department of Geology, University of Florida