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Map showing publication footprint
  • Usage in publication:
    • Sitkin Point formation*
  • Modifications:
    • Named
  • Dominant lithology:
    • Pyroclastics
    • Graywacke
    • Breccia
    • Tuff
  • 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 for exposures at Sitkin Point, Little Sitkin Island, Rat Islands group, Aleutian Islands, AK. Shown on geologic map of Little Sitkin Island. Composed of waterlaid pyroclastic material, tuffaceous graywacke, dacite-boulder tuff-breccia, andesitic tuff, and pumiceous tuff. Is more than 450 ft thick. Unconformably overlies Williwaw Cove formation (new); unconformably underlies Double Point dacite (new). Is probably early Quaternary age based on stratigraphic relations.

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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