U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS

National Geologic Map Database

NGMDB

Geologic Unit: Eureka

Usage:

Eureka Quartzite (CA*,ID*,NV*,UT*)
Eureka Quartzite of Pogonip Group (CA)
Eureka Group (CA)


Subunits:

GROUP STATUS (alphabetical): Barrel Spring Formation (CA), Johnson Spring Formation (CA).


Geologic age:

Middle Ordovician*
Ordovician, Late*


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

Not desginated. Named from exposures at Eureka, NV (Hague, 1883).
Standard section: Lone Mountain section which is along west base of Lone Mountain, about 15 mi northwest of Eureka, in T. 20 N., R. 51 E., Eureka Co., NV (Webb, 1956).


AAPG geologic province:

Great Basin province*


NGMDB

For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).

Find Us:

twitter

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
Supported by the National Cooperative Geologic Mapping Program
URL: http://ngmdb.usgs.gov
Page Contact Information: Personnel
Page Last Modified: Tue Jun 3 16:43:00 2014