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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Kiska Harbor formation*
  • Modifications:
    • Named
  • Dominant lithology:
    • Breccia
    • Pyroclastics
    • Volcanics
    • Sand
    • Conglomerate
  • AAPG geologic province:
    • Aleutian Islands province
    • Alaska Southwestern region
Publication:

Coats, R.R., Nelson, W.H., Lewis, R.Q., and Powers, H.A., 1961, Geologic reconnaissance of Kiska Island, Aleutian Islands, Alaska, IN Investigations of Alaskan volcanoes: U.S. Geological Survey Bulletin, 1028-R, p. R563-R581, (incl. geologic map, scale 1:63,360)


Summary:

Type section (pyroclastic facies) designated on bluff north of Trout Lagoon at head of Kiska Harbor; type section (lava flow facies) designated in Sredi Point, Kiska Island, Rat Island group, Aleutian Islands, AK. Unit occupies about 30 sq mi in north-central part of Kiska Island. Also outcrops on Little Kiska Island. Consists of subaerial lava flows, autoclastic breccias, pyroclastic rocks, and water-laid pumiceous sand and conglomerate. Lava flows predominate in north and water-laid beds in south. Unconformably overlies Vega Bay formation (new) on south; on north underlies rocks of Kiska Volcano and alluvium. Is probably late Tertiary or early Pleistocene age based on stratigraphic relations and correlation.

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


Map showing publication footprint
  • Usage in publication:
    • Kiska Harbor Formation*
  • Modifications:
    • Age modified
    • Geochronologic dating
  • AAPG geologic province:
    • Alaska Peninsula province
    • Alaska Southwestern region
Publication:

Scholl, D.W., Marlow, M.S., and Buffington, E.C., 1975, Summit basins of Aleutian Ridge, north Pacific: American Association of Petroleum Geologists Bulletin, v. 59, no. 5, p. 799-816. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Age is late Miocene based on 5.5 Ma isotopic age.

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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