- Usage in publication:
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- Bass Mountain diabase*
- Modifications:
-
- Original reference
- Dominant lithology:
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- Diabase
- AAPG geologic province:
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- Klamath Mountains province
Summary:
Bass Mountain diabase. Nonporphyritic, dark, somewhat greenish, compact lava, occasionally vesicular and more frequently fragmental. Is contemporaneous and partly interbedded with upper part of Bragdon formation. Age is Mississippian.
Named for fact it forms southern slope of Bass Mountain, [Project City quadrangle, Shasta Co.], northern CA.
Source: US geologic names lexicon (USGS Bull. 896, p. 124).
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 ([ ]).