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  • Usage in publication:
    • Red Shirt Gabbro
  • Modifications:
    • Named
  • Dominant lithology:
    • Gabbro
  • AAPG geologic province:
    • Okanogan province
Publication:

Menzer, F.J., Jr., 1983, Metamorphism and plutonism in the central part of the Okanogan range, Washington: Geological Society of America Bulletin, v. 94, no. 4, p. 471-498.


Summary:

Unit is named the Red Shirt Gabbro. This post-metamorphic plutonic unit is exposed in the Okanogan Range, WA. Consists of massive, magmatic gabbro containing labradorite and green hornblende. Contact with the Wolf Canyon Quartz Diorite (new) may be intrusive or gradational. Age is Cretaceous. (B1565).

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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