- Usage in publication:
-
- Black Mountain andesite
- Modifications:
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- Original reference
- Dominant lithology:
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- Andesite
- AAPG geologic province:
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- Basin-and-Range province
Summary:
Pg. 49 (Arizona Bur. Mines Geol. Ser., no. 9). Black Mountain andesite appears to underlie Childs latite (new) at north end of Childs Mountain. Elsewhere, rests on the latite, and, though the latite may be merely an intercalation in the Black Mountain, it is equally possible that apparent occurrence of the Black Mountain beneath the latite is due to faulting. Age is Pliocene(?).
Type locality: at north end of Childs Mountain, Ajo quadrangle, Pima Co., AZ. [Derivation of name not stated.]
Source: US geologic names lexicon (USGS Bull. 1200, p. 369).
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 ([ ]).