Late Quaternary caldera-forming eruptions in the eastern Aleutian arc, Alaska

Geology
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Abstract

Late Quaternary calderas have been identified at 12 of 40 volcanic centers in the eastern Aleutian arc, and sufficient radiocarbon dates and geologic information have now been obtained to either date or constrain the timing of the climactic caldera-forming eruptions. At least eight major caldera-forming events, each characterized by estimated eruption volumes of more than 10 km 3 , occurred at seven different volcanic centers in the Holocene, and as many as six of these had estimated eruption volumes of more than 50 km 3 . Eruptions of similar magnitude formed two other calderas in Wisconsin time. The dating of these hitherto little-known events adds significantly to the previously existing chronology of large prehistoric eruptions. This refined chronology is important in understanding eruption-induced climate changes, in assessing volcanic hazards, and in developing a tephrochronology for northwestern North America. © 1987 Geological Society of America.

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Publication type Article
Publication Subtype Journal Article
Title Late Quaternary caldera-forming eruptions in the eastern Aleutian arc, Alaska
Series title Geology
DOI 10.1130/0091-7613(1987)15<434:LQCEIT>2.0.CO;2
Volume 15
Issue 5
Year Published 1987
Language English
Publisher Geological Society of America
Description 5 p.
First page 434
Last page 438
Country United States
State Alaska
Other Geospatial Eastern Aleutian Islands
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