- Usage in publication:
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- Shoal Creek breccia
- Modifications:
-
- First used
- Dominant lithology:
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- Andesite
- AAPG geologic province:
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- Great Basin province
Summary:
First published use as a mapped unit name used along south side of Shoal Creek, T37S, Rs17 and 18W, Washington Co., UT in the Great Basin province. Geologic map. Stratigraphic chart. Overlies Rencher formation. Is older than the Maple Ridge porphyry. Consists of dark, massive to crudely bedded hypersthene-augite-hornblende andesite? several hundred ft thick. Tertiary age. Called "Shoal Creek porphyry" on geologic map. Named attributed to Blank (1959), an unpublished thesis. No type locality designated.
Source: GNU records (USGS DDS-6; Denver 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 ([ ]).