- Usage in publication:
-
- Horse Creek clays and shales
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Clay
- Shale
- Sandstone
- AAPG geologic province:
-
- Bend arch
- Llano uplift
Summary:
Pg. 374, 379. Horse Creek clays and shales in Strawn division. Upper 100 feet, usually blue clay, slightly sandy, and containing a few clay ironstone nodules; lower 50 feet black clay shale or, in places, shaly black clay of nodular structure. Member of Strawn division [Strawn is 2nd from base of 5 Carboniferous divisions of Cummins, 1891]. Underlies Bull Creek sandstone and overlies Fox Ford bed. Age is Pennsylvanian.
[Named from valley of Horse Creek, San Saba Co., Colorado River region, central TX.]
Source: US geologic names lexicon (USGS Bull. 896, p. 981).
- Usage in publication:
-
- Horse Creek clay and shale
- Modifications:
-
- Areal extent
- AAPG geologic province:
-
- Fort Worth syncline
Summary:
Pg. 70. Horse Creek clay and shale in Strawn series. Underlies Bull Creek sandstone; overlies Fox Ford bed. [Age is Pennsylvanian; age of Strawn not discussed.]
[Report area in Parker County, central Texas.]
Source: US geologic names lexicon (USGS Bull. 1200, p. 1807); supplemental information from 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 ([ ]).