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  • Usage in publication:
    • Dutch Harbor Member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
    • Conglomerate
  • AAPG geologic province:
    • Aleutian Islands province
    • Alaska Southwestern region
Publication:

Lankford, S.M., and Hill, J.M., 1979, Stratigraphy and depositional environment of the Dutch Harbor Member of the Unalaska Formation, Unalaska Island, Alaska, IN Contributions to stratigraphy, 1979: U.S. Geological Survey Bulletin, 1457-B, p. B1-B14.


Summary:

Type section: section measured about 3 km east of village of Unalaska, Unalaska Island, Aleutian Islands, AK. Is member of Unalaska Formation. Consists of light- to medium-greenish-gray sandstone with interbedded conglomerate. Forms very fine to fine-grained, indurated sandstone; rhythmically bedded turbidite and debris-flow deposits. Is 126 m thick. Conformably overlies and underlies unnamed lower and upper aquagene volcanic sequences of Unalaska Formation. Is early(?) Miocene 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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