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National Geologic Map Database

Geologic Unit: Iron Mountains

Usage:

Iron Mountains Intrusive Suite (CA*)


Subunits:

(alphabetical) --all in CA*: Danby Lake Granite Gneiss, Granite Pass Granite, Iron Granodiorite Gneiss, unnamed garnet aplite.


Geologic age:

Late Cretaceous*


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

Granite Pass, southern Iron Mountains, in sec. 21, T. 1 S., R. 17 E., Granite Pass 7.5-min quadrangle, San Bernardino Co., CA (Howard, 2002).


AAPG geologic province:

Mojave basin*


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 ([ ]).