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Geologic Unit: Brownwood
Map showing publication footprint
  • Usage in publication:
    • Brownwood-Ranger series
    • Brownwood-Canyon series
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
    • Sandstone
  • AAPG geologic province:
    • Bend arch
    • Llano uplift
Publication:

Dumble, E.T., 1890, Report of the State Geologist [Texas], IN Dumble, E.T., First annual report of the Geological Survey of Texas, 1889: Geological Survey of Texas Annual Report, v. 1, p. xvii-lxxv. [Available online from the University of Texas-Austin library: http://www.lib.utexas.edu/books/dumble/]


Summary:

Pl. 3, p. lxvii. [Brownwood-Ranger series on p. lxvii and Brownwood-Canyon on pl. 3.] Limestones and sandstones containing considerable salt and some oil and gas. Overlies Milburn-Strawn series and underlies Waldrip-Cisco series. Study area in central basin, approximately from Colorado River north to Red River, north-central Texas. Age is Carboniferous (Coal Measures).
Named from Brownwood, Brown Co., central TX.

Source: US geologic names lexicon (USGS Bull. 896, p. 277-278); supplemental information from GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Brownwood division
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
    • Sandstone
  • AAPG geologic province:
    • Bend arch
    • Llano uplift
Publication:

Tarr, R.S., 1890, Preliminary report on the coal fields of the Colorado River [Texas], IN Dumble, E.T., First annual report of the Geological Survey of Texas, 1889: Geological Survey of Texas Annual Report, v. 1, p. 200-216. [Available online from the University of Texas-Austin library: http://www.lib.utexas.edu/books/dumble/]


Summary:

Pg. 204-207. Brownwood division. Chiefly limestone, but alternating with sandstone; no coal. Thickness 1,300 feet. Underlies Waldrip coal division and overlies Milburn shales. Age is Late Carboniferous.
Named from Brownwood, Brown Co., central TX.

Source: US geologic names lexicon (USGS Bull. 896, p. 277-278).


Map showing publication footprint
  • Usage in publication:
    • Brownwood division*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Bend arch
    • Llano uplift
Publication:

Hill, R.T., 1901, Geography and geology of the Black and Grand Prairies, Texas: U.S. Geological Survey Annual Report, 21, pt. 7, 666 p. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/ar/ar21_7]


Summary:

Pg. 98. Brownwood division. Now includes Milburn division of Tarr and overlies Richland division. Present in Colorado River Valley, south of Callahan Divide, in Brown, Lampasas, and San Saba Counties, central Texas. [See 1901 entry under Milburn shales.]

Source: US geologic names lexicon (USGS Bull. 896, p. 277-278); supplemental information from GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Brownwood division†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Bend arch
    • Llano uplift
Publication:

Gordon, C.H., Girty, G.H., and White, David, 1911, The Wichita formation of northern Texas: Journal of Geology, v. 19, no. 2, p. 110-134.


Summary:

Pg. 117. Brownwood division. Now includes Brownwood and Milburn of Tarr, and is = Canyon division.

Source: US geologic names lexicon (USGS Bull. 896, p. 277-278).


Map showing publication footprint
  • Usage in publication:
    • Brownwood division†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Bend arch
    • Llano uplift
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. 13. Brownwood and Milburn of Tarr practically = Canyon group.

Source: US geologic names lexicon (USGS Bull. 896, p. 277-278).


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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