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Late Holocene glacier fluctuations in the Wrangell Mountains, Alaska

Gregory C. Wiles, Gordon C. Jacoby, Nicole K. Davi and Ryan P. McAllister
Late Holocene glacier fluctuations in the Wrangell Mountains, Alaska
Geological Society of America Bulletin (July 2002) 114 (7): 896-908


Four intervals of late Holocene glacier advance are recognized from study of nine valley glaciers in the Wrangell and westernmost St. Elias Mountains of Alaska. The oldest glacial advance is recognized at the Nabesna and Barnard Glaciers where five radiocarbon ages suggest advance as early as 2700 cal. (calibrated) yr B.P. Two additional radiocarbon-dated advances are centered on cal. yr A.D. 300 and the beginning of the Little Ice Age about A.D. 1200. The best-documented Little Ice Age advances occurred during the mid-1600s through the 1800s and are recognized at all nine glaciers. These latter advances are dated by tree rings of trees overrun by glaciers in five glacier valley, by 17 radiocarbon dates, and by tree-ring and lichen ages from 20 moraines that were deposited during the culmination of these advances. The glacial chronology is broadly similar to chronologies from adjoining Alaskan mountain ranges, at both coastal and interior sites for the past 3000 yr. There are, however, differences in timing of advances during the first millennium A.D. The glacial history for the past 2000 yr is also consistent with temperature-sensitive proxy records from interior Alaska and Yukon Territory.

ISSN: 0016-7606
EISSN: 1943-2674
Serial Title: Geological Society of America Bulletin
Serial Volume: 114
Serial Issue: 7
Title: Late Holocene glacier fluctuations in the Wrangell Mountains, Alaska
Affiliation: College of Wooster, Department of Geology, Wooster, OH, United States
Pages: 896-908
Published: 200207
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 47
Accession Number: 2002-060665
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sketch maps
N61°00'00" - N62°19'60", W144°00'00" - W141°00'00"
Secondary Affiliation: Lamont-Doherty Earth Observatory, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200219
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