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  • Usage in publication:
    • Craig's Ranch basalt
  • Modifications:
    • Named
  • Dominant lithology:
    • Basalt
  • AAPG geologic province:
    • Plateau sedimentary province
Publication:

Best, M.G., and Brimhall, W.H., 1970, Late Cenozoic basalt types in the western Grand Canyon region, IN Hamblin, W.K., and Best, M.G., eds., The western Grand Canyon district [Utah]: Utah Geological Society, Guidebook to the geology of Utah, no. 23, p. 57-74.


Summary:

Unit is named the Craig's Ranch basalt. Consists of basalt characterized by phenocrysts of augite and olivine; microphenocrysts of plagioclase appear in some flows. Age is late Cenozoic.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


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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