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.
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