Late Wisconsinan glaciation of the Glenlyon Range, Pelly Mountains, Yukon Territory, Canada

Airphoto analysis, identification of erratics, and stratigraphic and geomorphic investigations were used to determine the nature of McConnell (Late Wisconsinan) age glaciation in the Glenlyon Range, Yukon Territory. Most of the peaks of the Glenlyon Range were nunataks within the Selwyn Lobe of the...

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Bibliographic Details
Published in:Canadian Journal of Earth Sciences
Main Authors: Ward, Brent C., Jackson Jr., Lionel E.
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1992
Subjects:
General Earth and Planetary Sciences
Yukon
Canada
Selwyn
Pelly Mountains
Glenlyon Range
Little Sheep Creek
glacier*
Ice Sheet
Online Access:http://dx.doi.org/10.1139/e92-156
http://www.nrcresearchpress.com/doi/pdf/10.1139/e92-156
Description
Summary:Airphoto analysis, identification of erratics, and stratigraphic and geomorphic investigations were used to determine the nature of McConnell (Late Wisconsinan) age glaciation in the Glenlyon Range, Yukon Territory. Most of the peaks of the Glenlyon Range were nunataks within the Selwyn Lobe of the Cordilleran Ice Sheet. The configuration of local and Selwyn Lobe moraines indicates that local glaciers did not extend beyond the cirques and made no contribution to the Selwyn Lobe. These conclusions are confirmed by the character of sediments examined in sections along Little Sheep Creek and by the distribution of erratics in one of the cirque valleys. Aridity limited local ice growth; large glaciers did not grow because of insufficient precipitation.

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