USGS Visual Identifier
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Geologic Unit: Pogonip

Pogonip Group (CA*,ID*,NV*,UT*)
Pogonip Formation of Mount Hamilton Group (NV)
Pogonip Limestone (NV)

Cambrian, Late*
Ordovician, Early*
Ordovician, Middle*

Geologic Province:
Great Basin province*

Areal Extent:

Type Locality:
Pogonip Ridge in White Pine [Hamilton] district, about 30 mi southeast of Eureka, NV. [On Pancake Summit and Green Springs 15-min quadrangles, Pogonip Ridge of King's usage is shown as Mount Hamilton of the White Pine Range] (King, 1876). [From US geologic names lexicons, USGS Bull. 896, 1200]

GROUP STATUS (alphabetical): Antelope Valley Limestone (CA*,NV*), Deadman Spring Dolomite (UT*), Eureka Quartzite (CA), Fillmore Formation (UT*) or Fillmore Limestone (NV,UT), Goodwin Limestone (NV*), House Limestone (NV*,UT*), Juab Limestone (NV,UT*), Kanosh Shale (NV*,UT*), Lehman Formation (NV*,UT*), Mazourka Formation (CA), Ninemile Formation (NV*), Parker Spring Formation (NV), Shingle Limestone (NV), Tank Hill Limestone (NV), Stoneberger Shale (NV), Wah Wah Limestone (NV,UT*), Watson Ranch Quartzite (UT), Yellow Hill Limestone (NV).

Unit Name History:
Named (C. King, 1876, US Geol. Expl. 40th Par. Atlas, map 4; 1878, US Geol. Expl. 40th Par., v. 1, p. 187-195, 248) [From US geologic names lexicons, USGS Bull. 896, 1200; synopses not included here].
Areal limits (Hintze and Best, 1987).
Overview; Areal limits (Hintze and Axen, 1995).

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