- Usage in publication:
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- Eppenauer Ranch Formation
- Modifications:
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- Areal extent
- AAPG geologic province:
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- Permian basin
Summary:
Eppenauer Ranch Formation mapped in the Davis Mountains area, Jeff Davis Co, west TX in the Permian basin. Consists of basalt, aphanitic, hard, massive to vesicular, dark brown to black. Thickness probably exceeds 100 ft. [Unclear on Correlation of Map Units if Eppenauer Ranch is part of Vieja Group.] [Author states that correlation of volcanic rocks from area to area on Marfa sheet is uncertain--little attempt is made to correlate between areas. The rocks are described by area.] Of Oligocene age. Geologic map.
Source: GNU records (USGS DDS-6; Denver 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 ([ ]).