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Map showing publication footprint
  • Usage in publication:
    • Esperance sand member*
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Sand
    • Gravel
  • AAPG geologic province:
    • Puget Sound province
Publication:

Newcomb, R.C., 1952, Ground-water resources of Snohomish County, Washington: U.S. Geological Survey Water-Supply Paper, 1135, 133 p., (incl. geologic map, scale 1:62,500)


Summary:

Pg. 19-25, pl. 1. Esperance sand member of Vashon drift. Largely an advance outwash deposit consisting of sand and gravel up to 400 or 500 feet thick; discontinuous silt beds common. Overlies Admiralty clay (new).
Exposed in scattered areas in western part of Snohomish Co., northwestern WA.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1285).


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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