Abstract
Deposits of Kaskawulsh Glacier express major climatic changes of the last 10,000 years. A great retreat, miles up valley from present terminus, occurred 12,000 to 9,000 yr ago, leaving drift on valley walls and alluvial fans. Winds added up to 8 feet of loess on these deposits and buried 9700 year-old vegetation near the present terminus. During Slims nonglacial interval weathering developed a red-yellow paleosol in this loess. In lower parts of a bog, just above the Neoglacial terminal moraine, dominant grass pollen and moss spores suggest a wetter climate than today. Just above the 3300-yr-old date in this bog, peat with sedge, spruce, and artemesia pollen show a change to a drier climate. The climatic change and reactivated outwash signal the Neoglacial advance 2600 to 3000 yr ago. Kaskawulsh reached its terminal position approximately 300 yr ago, and was there as late as 145 yr ago.
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