U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Geologic Units: Adams
Search archives
Map showing publication footprint
  • Usage in publication:
    • Adams Formation
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Clay
    • Silt
    • Till
  • AAPG geologic province:
    • Alaska Southeastern region
Publication:

McKenzie, G.D., 1970, Glacier geology of Adams Inlet southeastern Alaska: Ohio State University, Institute of Polar Studies Report, no. 25, 121 p.


Summary:

Adams Formation. Formerly called Adams lacustrine-till complex by McKenzie (1969). Composed of clay, and sandy silt with intercalated clayey till. Forms glaciolacustrine deposits, massive to rhythmically bedded. Is 55 m thick. Overlies lower member of Van Horn Formation with sharp contact. Underlies Berg Formation with gradational contact. Age is Holocene (younger than 1,700 +/-100 yr B.P.).
Type section: exposures on southeast shore of Adams Inlet, Lat. 58 deg. 53 min. N., Lat. 135 deg. 47 min. 54 sec. W. [southeast AK]. Top of section has elevation of 199 m and is 1.9 km N. 30 deg. E. of top of Tree Mountain.

Source: GNU records (USGS DDS-6; Menlo GNULEX); US geologic names lexicon (USGS Bull. 1520, p. 5).


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 ([ ]).

Accessibility FOIA Privacy Policies and Notices

USA Gov U.S. Department of the Interior | U.S. Geological Survey
Supported by the National Cooperative Geologic Mapping Program
Page Contact Information: Personnel
Page Last Modified: Wed 12 Mar 2025 02:57:01 PM MDT