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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Bald Mountain dacite
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Dacite
  • AAPG geologic province:
    • Las Vegas-Raton basin
Publication:

Cross, Whitman, 1896, Geology of the Silver Cliff and Rosita Hills, Colorado, IN Walcott, C.D., Seventeenth annual report of the United States Geological Survey to the Secretary of the Interior, 1895-1896; Part II: U.S. Geological Survey Annual Report, 17, pt. 2, p. 263-403. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/ar/ar17_2]


Summary:

Pg. 295. Bald Mountain dacite. Clearly later than Rosita andesite and is cut by rhyolite, but relations to other igneous rocks of Silver Cliff-Rosita Hills district not known. Age is Tertiary.
Named from Bald Mountain, Custer Co., central southern CO.

Source: US geologic names lexicon (USGS Bull. 896, p. 105).


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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