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GEOREF RECORD

Composite Pleistocene snow line of Olympic Mountains and Cascade Range, Washington

Stephen C. Porter
Composite Pleistocene snow line of Olympic Mountains and Cascade Range, Washington
Geological Society of America Bulletin (1964) 75 (5): 477-481

Abstract

The altitude of a composite Pleistocene snow line, based on altitudes of the upper limits of the lowest north-facing cirque floors, increases inland (east or northeast) in both ranges. In the southern Cascade Range the rate of rise of the Pleistocene cirque floors equals approximately that of small alpine glaciers, suggesting lower temperature as the primary factor controlling depression of the snow line during glaciations. In the northern Cascade Range and the Olympic Mountains, the cirque floors rise eastward more steeply than the small modern glaciers suggesting that significant reduction in precipitation at glacial maxima here offset the effects of decreased temperature and resulted in differential depression of the snow line.


ISSN: 0016-7606
EISSN: 1943-2674
Coden: BUGMAF
Serial Title: Geological Society of America Bulletin
Serial Volume: 75
Serial Issue: 5
Title: Composite Pleistocene snow line of Olympic Mountains and Cascade Range, Washington
Author(s): Porter, Stephen C.
Pages: 477-481
Published: 1964
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
Accession Number: 1964-013491
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N40°00'00" - N51°00'00", W123°00'00" - W120°30'00"
N45°30'00" - N49°00'00", W124°45'00" - W116°55'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1964
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