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National Geologic Map Database

Geologic Unit: American Ravine

Usage:

American Ravine Andesite Porphyry (NV*)


Geologic age:

late Tertiary (Miocene)*


Type section, locality, area and/or origin of name:

Probably named from American Ravine west of Silver City, Silver City district, south end of Virginia Range, 12 mi northeast of Carson City, Lyon Co., NV (GNU records, USGS DDS-6).


AAPG geologic province:

Great Basin province*


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 ([ ]).