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Geologic Unit: Faneto
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Map showing publication footprint
  • Usage in publication:
    • Faneto Formation*
  • Modifications:
    • Named
  • Dominant lithology:
    • Conglomerate
    • Graywacke
    • Sandstone
  • AAPG geologic province:
    • Aleutian Islands province
    • Alaska Southwestern region
Publication:

Gates, Olcott, Powers, H.A., and Wilcox, R.E., 1971, Geology of the Near Islands, Alaska, with a section on the surficial geology of the Near Islands [Attu Island, Agattu Island, and Shemya Island] by J.P. Schafer, IN Investigations of Alaskan volcanoes: U.S. Geological Survey Bulletin, 1028-U, p. U709-U822, (incl. geologic maps, scale 1:63,360)


Summary:

[Named for Faneto Hill.] Type locality designated as Faneto Hill, west of West Arm Holtz Bay, northeastern Attu Island, Near Islands, AK. Composed of at least 1500 ft of sub-aerially deposited, poorly sorted, coarsely bedded, coarse red clastic rocks consisting of conglomerate, coarse sandstone and graywacke, and thin argillite lenses. Overlies Chuniksak Formation, of probable Miocene age, with apparent angular unconformity, though contact not seen. Erosional features show that Faneto pre-dated last major Pleistocene glaciation; hence age interpreted as late Tertiary or early Pleistocene.

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


Map showing publication footprint
  • Usage in publication:
    • Faneto Formation*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Aleutian Islands province
    • Alaska Southwestern region
Publication:

Vallier, T.L., Scholl, D.W., Fischer, M.A., Bruns, T.R., Wilson, F.H., von Huene, Roland, and Stevenson, A.J., 1994, Geologic framework of the Aleutian arc, Alaska, IN Plafker, George, and Berg, H.C., eds., The geology of Alaska: Geological Society of America, The Geology of North America, The Decade of North American Geology (DNAG), v. G-1, p. 367-388.


Summary:

Unit age revised from Tertiary or Quaternary to: latest Miocene and Pliocene 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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