- Usage in publication:
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- Cisneros basalt
- Modifications:
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- Original reference
- Dominant lithology:
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- Basalt
- AAPG geologic province:
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- San Juan basin
Summary:
Pg. 3, 38, 51-53, pl. 1. Cisneros basalt of Hinsdale series. Dark-gray slightly vesicular porphyritic olivine basalt. Thickness 10 to 30 feet. Overlies Cordito member (new) of Los Pinos formation with slight angular unconformity. Not overlain by younger rocks and original upper surfaces have been destroyed. Name credited to Butler (unpub. dissert.). Age is Pliocene.
Named from Cisneros Park, [in secs. 7 and 8, T. 29 N., R. 8 E., Broke Off Mountain and San Antonio Mountain 7.5-min quadrangles, Rio Arriba Co., Carson National Forest area, central northern NM]. Found in Las Tablas quadrangle, west and north of [Canada] del Agua, and in extreme northern corner of secs. 16 and 17, T. 29 N., R. 9 E., Rio Arriba Co., [Carson National Forest area], central northern NM.
[Additional locality information from USGS historical topographic map collection TopoView, accessed June 8, 2014.]
Source: US geologic names lexicon (USGS Bull. 1200, p. 809).
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 ([ ]).