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National Geologic Map Database
Geologic Unit: Wilkie Ranch
Map showing publication footprint
  • Usage in publication:
    • Wilkie Ranch Formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Marlstone
    • Limestone
    • Conglomerate
  • AAPG geologic province:
    • Permian basin
Publication:

Cys, J.M., 1976, Wilkie Ranch Formation, new Permian unit in Finlay Mountains, West Texas: American Association of Petroleum Geologists Bulletin, v. 60, no. 7, p. 1107-1110. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Name formally applied to some rocks informally designated "Leonard series (undivided)" by Albritton and Smith (1965) and informally "Wilkie Ranch formation" by Cys (1975). Named for the Wilkie Ranch in the western Finlay Mountains, Hudspeth Co, TX, Permian basin. Basal part not exposed; therefore type section is the interval between 0 and 230 ft in the Gulf 1 J. Burner-State "B" well. Location map. Columnar section showing rocks in the Finlay Mountains. Consists on outcrop in Finlay Mountains (from Albritton, Smith) of gray dolomitic fossiliferous--fusulinids, bryozoans, brachiopods, leaves, sponges, pelecypods, gastropods, cephalopods, corals, etc.--marlstone; conglomerate of well-rounded pebbles, cobbles, boulders of limestone and scattered pebbles of chert in a sandy matrix; and gray crystalline limestone; predominant lithology is marlstone; many of the limestone beds are crinoidal. Is 1,653 ft in the outcrop section, a section representative of shelf edge deposition between Marfa basin and Diablo platform. Is distinctive, mappable. Ranges between 1,675 and 1,750 ft thick. Unconformably overlies Hueco Limestone. Unconformably underlies Cretaceous rocks. Fossils of Leonard age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

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