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GEOREF RECORD

Glacial geology of the lower Alatna Valley, Brooks Range, Alaska

Thomas D. Hamilton
Glacial geology of the lower Alatna Valley, Brooks Range, Alaska (in United States contributions to Quaternary research--Internat. Assoc. Quaternary Research, 8th Cong., Paris, 1969)
Special Paper - Geological Society of America (1969) 123: 181-223

Abstract

Glaciers reached the lower Alatna Valley in three episodes. During the oldest, piedmont glaciers extended 60 miles south of the range and covered most of the Koyukuk Lowlands. The later Kobuk glaciation advanced this far, then retreated, then advanced 35 miles south of the range. Itkillik drift, the youngest, is subdivided into four moraine belts, the oldest and most extensive extending 30 miles south of the range. Subdivisions and correlations of the glacial sequence are based on extent and position of the drift sheets, inferred glacial regimens, postglacial modification of glacial deposits, radiometric dates, and ice limits within the upper Alatna Valley. The four Itkillik episodes are equivalent to those in the Anaktuvuk Valley, and radiocarbon dates suggest a Wisconsin age for them. The Kobuk is early Wisconsin, and the oldest is Illinoisian.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 123
Title: Glacial geology of the lower Alatna Valley, Brooks Range, Alaska
Title: United States contributions to Quaternary research--Internat. Assoc. Quaternary Research, 8th Cong., Paris, 1969
Author(s): Hamilton, Thomas D.
Pages: 181-223
Published: 1969
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
Accession Number: 1969-032651
Categories: GeochronologyQuaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus., tables
N66°00'00" - N69°40'00", W165°00'00" - W141°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1969
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