Abstract

The eastern slope of Rocky Mountain National Park, Colorado, has been subjected to at least three separate Pleistocene glaciations, which from oldest to youngest are correlated with the Buffalo, Bull Lake, and Pinedale glaciations of Blackwelder in the Wind River Mountains of Wyoming.

In this area, deposits of the oldest glaciation are known from only one locality. Deposits of the Bull Lake glaciation comprise two sets of moraines indicative of two advances of ice separated by a significant recession; those of the Pinedale glaciation comprise three sets of moraines indicative of a maximum advance of the ice and two recessional halts or minor readvances.

Moraines of two minor advances of the ice, correlated with the Temple Lake and historic stades of Neoglaciation in the Wind River Mountains, occur in the cirque heads.

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