T68 Evolving Understanding of the Mechanics, Sedimentology, and Landscapes of Glaciers and Glaciation: a Tribute to Dr. Ed Evenson

Sunday, 22 September 2024
1:30 PM - 5:30 PM
209B

A COSMOGENIC NUCLIDE RECORD FROM KATAHDIN, MAINE, USA

Paper number: T68-5
Program: Technical Sessions
Time: 2:35 PM – 2:50 PM

Authors

Abstract

During the height of the last ice age, the Laurentide Ice Sheet (LIS) covered Maine. The LIS subsequently thinned during the termination, and allowed Katahdin, the highest mountain in Maine (1606 m), to emerge out of the thinning ice sheet. Here we report our work on our glacial-geomorphic mapping and 10Be exposure ages of glacially transported boulders on Katahdin. We investigated several moraines, including a moraine belt that wraps around the mountain at ~750 m elevation and represents a stillstand. Our 10Be ages suggest multiple moraines were formed between 16.1 and 14.5 ka. Previous work has debated the existence of small alpine glaciers in the cirques during the termination. We are also investigating the cirques for evidence of glacial activity during the termination.

Geological Society of America Abstracts with Programs. Vol. 56, No. 5

doi: 10.1130/abs/2024AM-403655

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