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Map showing publication footprint
  • Usage in publication:
    • West Cove member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Dacite
  • AAPG geologic province:
    • Aleutian Islands province
    • Alaska Southwestern region
Publication:

Snyder, G.L., 1959, Geology of Little Sitkin Island, Alaska, IN Investigations of Alaskan volcanoes: U.S. Geological Survey Bulletin, 1028-H, p. H169-H210, (incl. geologic map, scale 1:20,000)


Summary:

Named as a member of Little Sitkin dacite (new). Type locality designated on north side of West Cove, Little Sitkin Island, Rat Islands group, Aleutian Islands, AK. Consists of two aa flows (one at cove and other at crater on south slope of Little Sitkin volcano). Unit composed of black glassy dacite containing abundant small plagioclase phenocrysts and shown by analyses to be low in silica for dacite. Flows were extruded about 50 years ago. Cove flow overlies Williwaw Cove formation (new); crater flow overlies low-silica dacite of Little Sitkin dacite. Geologic map of Little Sitkin Island shows age is Quaternary.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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