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National Geologic Map Database

Geologic Unit: Silvies

Usage:

Silvies Member of Snowshoe Formation (OR*)


Geologic age:

Jurassic, Middle*


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

Type locality: embraces four quarter-sections surrounding juncture of secs. 21, 22, 27, and 28, T. 16 S., R. 27 E., where Silvies River and a small tributary from west have cut steep-sided well-exposed canyons across strike of unit, east-central OR (Dickinson and Vigrass, 1965).


AAPG geologic province:

Snake River 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 ([ ]).