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National Geologic Map Database
Geologic Unit: Homer
Map showing publication footprint
  • Usage in publication:
    • Homer limestone member
  • Modifications:
    • Areal extent
Publication:

Mansfield, G.R., 1921, Igneous geology of southeastern Idaho: Geological Society of America Bulletin, v. 32, no. 2, p. 249-266.


Summary:

Homer limestone member of Wayan formation. Referred 4 times (and showed its distribution on geologic map) to Homer limestone member of Wayan formation. Lower Cretaceous(?) southeastern Idaho, but did not define it. In Jour. Geol., v. 29, 1921, p. 458, 459, Mansfield casually referred twice to same unit, and also mapped it.

Source: US geologic names lexicon (USGS Bull. 896, p. 973).


Map showing publication footprint
  • Usage in publication:
    • Homer limestone member*
  • Modifications:
    • [Principle reference]
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Snake River basin
Publication:

Mansfield, G.R., 1927, Geography, geology, and mineral resources of part of southeastern Idaho: U.S. Geological Survey Professional Paper, 152, 453 p.


Summary:

Pg. 107. Homer limestone member of Wayan formation. Occurs in northeastern part of Cranes Flat quadrangle and extends into adjacent regions north and east. Its stratigraphic position is not known definitely. Ordinarily the surface underlain by it is strewn with white pieces of rock, which by their arrangement on the slopes suggest the attitude of the beds. Locally, as on slope northeast of Sugarloaf Mountain, the limestone forms massive ledges. At this place some of upper beds are dull gray, coarsely crystalline, and crowded with poorly preserved fossils [pelecypods, gastropods identified by T.W. Stanton, USGS; listed, see p. 107]. [Age is considered Early(?) Cretaceous.]
[Named from exposures in valley of Homer Creek, Cranes Flat quadrangle, Bingham Co., southeastern ID.]

Source: Publication; US geologic names lexicon (USGS Bull. 896, p. 973).


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 ([ ]).