USGS Visual Identifier
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Geologic Unit: Lone Mountain

Lone Mountain Dolomite (NV*)
Lone Mountain Formation (NV,UT)

Devonian, Early*
Silurian, Late*
Geologic Province:
Great Basin province*

Areal Extent:

Type Locality:
Lone Mountain, about 18 mi north of Eureka, Eureka Co., NV (Hague, 1883). [From US geologic names lexicons, USGS Bull. 896, 1200]

Unit Name History:
Named (A. Hague, 1883, USGS 3d Ann. Rpt., p. 253, 262, 267; 1892, USGS Monograph 20) [From US geologic names lexicon, USGS Bull. 896; synopsis not included here].
Restricted, lower part assigned to Hanson Creek Formation (new) and Roberts Mountains Formation (new); Redescribed; Reference (C.W. Merriam, 1940, GSA Spec. Paper 25, p. 8 (tbl 1), 10-14) [From US geologic names lexicon, USGS Bull. 1200; synopsis not included here].

Note: If you need more information, please contact Nancy Stamm (
Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
Database project personnel
Last modified: 15-Jan-2013