Holocene Glaciation of the Arrigetch Peaks, Brooks Range, Alaska

Eleven cirque glaciers and associated deposits within the granitic Arrigetch Peaks of the west-central Brooks Range face north, minimizing insolation. Shading by surrounding mountainous terrain decreases insolation on these landforms even more significantly, favoring the formation of glacier-cored m...

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Bibliographic Details
Published in:ARCTIC
Main Authors: Ellis, James M., Hamilton, Thomas D., Calkin, Parker E.
Format: Article in Journal/Newspaper
Language:English
Published: The Arctic Institute of North America 1981
Subjects:
Ablation
Glacial epoch
Glacial landforms
Glaciers
Lichenometry
Glaciation
Brooks Range
Alaska
Arctic
glacier
glaciers
Online Access:https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65569
Description
Summary:Eleven cirque glaciers and associated deposits within the granitic Arrigetch Peaks of the west-central Brooks Range face north, minimizing insolation. Shading by surrounding mountainous terrain decreases insolation on these landforms even more significantly, favoring the formation of glacier-cored moraines. Comparison of glacier photographs taken in 1911, 1962, and 1979 reveals a record of decelerating recession. Geomorphic and lichenometric mapping suggests at least three to possibly eight phases of Holocene glacial expansion. These date between ~5000 and 300 yr B.P., based on the application of a central Brooks Range Rhizocarpon geographicum growth curve.

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