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GEOREF RECORD

Reconnaissance geology of Amlia Island, Aleutian Islands, Alaska

Hugh McLean, James R. Hein and Tracy L. Vallier
Reconnaissance geology of Amlia Island, Aleutian Islands, Alaska
Geological Society of America Bulletin (August 1983) 94 (8): 1020-1027

Abstract

Excellent shoreline exposures of sedimentary and volcanic rocks, which record the earliest observable history of the volcanic arc. Occurrence of Reticulofenestra reticulata and Dictyococcites scrippsae indicates late middle Eocene to early Oligocene age. Whole-rock radiometric ages of 32 and 39 m.y. from igneous rocks. Slightly and highly altered rocks. The island is structurally simple; high-angle faults with small displacement are common, and may reflect emplacement of shallow-seated intrusive rocks. Wave-cut terraces appear to be in equilibrium and suggest Recent tectonic stability.--Modified journal abstract.


ISSN: 0016-7606
EISSN: 1943-2674
Coden: BUGMAF
Serial Title: Geological Society of America Bulletin
Serial Volume: 94
Serial Issue: 8
Title: Reconnaissance geology of Amlia Island, Aleutian Islands, Alaska
Affiliation: U. S. Geol. Surv., Menlo Park, CA, United States
Pages: 1020-1027
Published: 198308
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 14
Accession Number: 1983-053080
Categories: Areal geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sketch map
N51°30'00" - N52°30'00", W174°00'00" - W173°00'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 1983
Program Name: USGSOPNon-USGS publications with USGS authors
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