Paleo Slide Set: Climate and the Classic Maya Civilization
Comparison of data ostracods and Maya cultural periods, from Curtis et al. 1997

The oxygen isotope data measured on ostracods from Punta Laguna sediments have been 
converted from radiocarbon years to calendar years and compared to Mayan cultural periods. 
Superimposed upon the mean changes in the record are distinct peaks that represent arid 
climate conditions. These peaks occur at 585 A.D., 862 A.D., 986 A.D., 1051 A.D. and 1391 A.D. 
Error is approximately +/-50 years. The first peak at 585 A.D. coincides with the early/late Classic 
boundary.

This boundary is associated with the "Maya Hiatus", which lasted between 530 and 630 A.D. The Maya 
Hiatus was marked by a sharp decline in monument carving, abandonment in some areas and social upheaval. 
This event may have been drought-related. During the next 200 years from 600 to 800 A.D., the late Classic
Maya flourished and reached their cultural and artistic apex. The next peak in 18O/16O occurs at 862 A.D. 
and coincides with the collapse of Classic Maya civilization between 800 and 900 A.D. The earliest 
Postclassic Period was also relatively dry between 986 and 1051 A.D. At about 1000 A.D., mean oxygen 
isotope values decrease indicating a return to more humid conditions. Although a Postclassic resurgence 
occurred in the northern Yucatan, city-states in the southern lowlands remained sparsely occupied. These 
findings support a rather strong correlation between times of drought and major cultural discontinuities 
in Classic Maya civilization. 

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