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Geologic Unit: Valera
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Map showing publication footprint
  • Usage in publication:
    • Valera bed
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Clay
  • AAPG geologic province:
    • Bend arch
Publication:

Drake, N.F., 1893, Report on the Colorado coal field of Texas, IN Fourth annual report of the Geological Survey of Texas, 1892: Geological Survey of Texas Annual Report, v. 4, p. 357-444. [Available online from the University of Texas-Austin library: http://www.lib.utexas.edu/books/dumble/]


Summary:

Pg. 421, 426. Valera bed in Albany division. Clay, thin to 40 feet thick. Member of Albany division [Albany is uppermost of 5 Carboniferous divisions of Cummins, 1891]. Underlies Bead Mountain bed and overlies Jagger Bend bed. Age is possibly Permian.
[Named from town of Valera, west-central Coleman Co., Colorado River region, central TX.]

Source: Publication; US geologic names lexicon (USGS Bull. 896, p. 2227-2228).


Map showing publication footprint
  • Usage in publication:
    • Valera shale member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Bend arch
Publication:

Plummer, F.B., and Moore, R.C., 1922, Stratigraphy of the Pennsylvanian formations of north-central Texas: University of Texas Bulletin, no. 2132, 237 p.


Summary:

Pg. 195. Valera shale member of Belle Plains formation. Valera shale is a middle member of Belle Plains formation (middle formation of Wichita group). Underlies Bead Mountain limestone and overlies Jagger Bend limestone. [Age is Permian.]
[GNC remark (ca. 1936, US geologic names lexicon, USGS Bull. 896, p. 2227-2228): This definition is still recognized by Texas Geol. Survey. (See E.H. Sellards, Univ. Texas Bull., no. 3232, 1933.)]

Source: US geologic names lexicon (USGS Bull. 896, p. 2227-2228).


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 ([ ]).

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