Call number:
S 90.0002(1762)
In:
Professional paper
Description / Table of Contents:
Augustine Island (volcano) in lower Cook Inlet, Alaska, has erupted repeatedly in late-Holocene and historical times. Eruptions typically beget high-energy volcanic processes. Most notable are bouldery debris avalanches containing immense angular clasts shed from summit domes. Coarse deposits of these avalanches form much of Augustines lower flanks. A new geologic map at 1:25,000 scale depicts these deposits, these processes. We correlate deposits by tephra layers calibrated by many radiocarbon dates.Augustine Volcano began erupting on the flank of a small island of Jurassic clastic-sedimentary rock before the late Wisconsin glaciation (late Pleistocene). The oldest known effusions ranged from olivine basalt explosively propelled by steam, to highly explosive magmatic eruptions of dacite or rhyodacite shed as pumice flows. Late Wisconsin piedmont glaciers issuing from the mountainous western mainland surrounded the island while dacitic eruptive debris swept down the south volcano flank.
Type of Medium:
Series available for loan
Pages:
VII, 78 S. + 2 Kt.-Beil.
,
Ill., graph. Darst., Kt.
,
2 Kt.-Beil.
,
28 cm
ISBN:
9781411324114
,
1-411-32411-0
Series Statement:
U.S. Geological Survey professional paper 1762
URL:
http://pubs.usgs.gov/pp/1762/
Location:
Lower compact magazine
Branch Library:
GFZ Library
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