Late Pleistocene Alpine Glaciers and the Cordilleran Ice Sheet at Washington Pass, North Cascade Range, Washington

Topographic anomalies near Washington Pass attest that a former glacier at the head of Early Winters Valley, a Methow Valley tributary, captured the former head of State Valley, a Chelan Valley tributary. Striations at high altitudes and drift-dispersal patterns inconsistent with the configuration o...

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Bibliographic Details
Published in:Arctic and alpine research 1975-01, Vol.7 (1), p.25-32
Main Author: Waitt, Richard B.
Format: Article
Language:English
Subjects:
Alpine glaciers
Cirques
Geology
Glacial landforms
Glacial troughs
Glaciers
Granite
Ice
Ice sheets
Valleys
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Summary:Topographic anomalies near Washington Pass attest that a former glacier at the head of Early Winters Valley, a Methow Valley tributary, captured the former head of State Valley, a Chelan Valley tributary. Striations at high altitudes and drift-dispersal patterns inconsistent with the configuration of small local glaciers, either before or after capture, indicate that ice-sheet glaciation postdated the most recent alpine glaciation. Because the erosional landforms are sharp and the drift unweathered, alpine and ice-sheet histories at Washington Pass are correlated with stades of the Fraser Glaciation in the Puget Lowland.
ISSN:0004-0851
2325-5153
DOI:10.1080/00040851.1975.12003806