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Map showing publication footprint
  • Usage in publication:
    • Eastland formation
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Bend arch
Publication:

Plummer, F.B., 1919, Preliminary paper on the stratigraphy of the Pennsylvanian formations of north-central Texas, with discussion: American Association of Petroleum Geologists Bulletin, v. 3, no. 1, p. 132-150. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Pg. 133-145. Eastland formation. Includes all strata from top of Ranger limestone member of Ranger formation to top of Eastland limestone member (top member of Eastland formation). Thickness 100 to 175 feet. Is top formation of Canyon division. Underlies Jacksboro formation and overlies Ranger formation. [Age is Pennsylvanian.]
[Named from Eastland, Eastland Co., Brazos River Valley, central northern TX.]

Source: US geologic names lexicon (USGS Bull. 896, p. 654).


Map showing publication footprint
  • Usage in publication:
    • Eastland formation†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Bend arch
Publication:

Plummer, F.B., and Moore, R.C., 1922, Pennsylvanian stratigraphy of north-central Texas: Journal of Geology, v. 30, no. 1, p. 18-42.


Summary:

[†Eastland formation of Canyon group abandoned. Replaced with Caddo Creek formation. See Plummer and Moore's 1922 Jour. Geol. entry.]

Source: US geologic names lexicon (USGS Bull. 896, p. 654).


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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