Abstract
The Mexican glacial chronology is based on morphostratigraphy, tephrochronology, 14 C and cosmogenic 36 Cl exposure ages. Glaciers formed moraines during MIS 6, between 21–17.5, 17–14, 14–13, 12–10 and 8.3–7 ka BP. ELA depressions for the five late Quaternary advances were 1030, 930, 730, 550 and 250 m, respectively. A temperature decrease of 5–9 °C supports marked cooling over tropical land and oceans during the last glacial maximum. Evidence does not indicate glacier expansion during, but rather immediately after, the Younger Dryas and during the 8.2 ka event. Little Ice Age cooling is documented by distinctive moraines.
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