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Map showing publication footprint
  • Usage in publication:
    • Beacon Flat formation
  • Modifications:
    • Original reference
  • AAPG geologic province:
    • Great Basin province
Publication:

Fails, T.G., 1960, Permian stratigraphy at Carlin Canyon, Nevada: American Association of Petroleum Geologists Bulletin, v. 44, no. 10, p. 1692-1703. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Pg. 1694-1695 (geol. map), 1697-1699. Beacon Flat formation. Poorly exposed on Beacon Flat, Elko County, Nevada. Divided into unnamed lower and upper members separated by an estimated 1,100 feet-thick covered interval (middle member). Lower member, exposed on west side of Beacon Flat, consists of silty calcisiltites and calcilutites interbedded with clean, gray and tan calcarenites, sparsely fossiliferous; thickness about 550 feet; possibly correlative with upper part of Nolan and others' 1956 (USGS Prof. Paper 276, p. 67-68) Carbon Ridge formation in Eureka area, Eureka County, Nevada. Upper member, exposed on east side of Beacon Flat, consists of massive and thick-bedded gray calcarenites, dolomitized in places and containing poorly preserved fossils (fusulinids, brachiopods, bryozoans, crinoids); thickness about 1,140 feet. Total thickness of formation about 2,800 feet. Conformably overlies Buckskin Mountain formation; top of transitional zone marked by a limestone-pebble conglomerate. Conformably underlies Carlin Canyon formation. Age is Permian (Wolfcampian and Leonardian), based on fossils (fusulinids, corals) identified from lower member. Report includes measured section, geologic map.
Type section [composite]: on north side of Humboldt River at Carlin Canyon, [Grindstone Mountain and Carlin East 7.5-min quadrangles], Elko Co., NV; lower member in SE/4 SE/4 NW/4 and NE/4 NE/4 SW/4 sec. 15, T. 33 N., R. 53 E., and upper member in SW/4 SE/4 and SE/4 SW/4 sec. 14, and in NW/4 sec. 23, T. 33 N., R. 53 E. Origin of name not stated, but probably named from Beacon Flat.

Source: Publication.


Map showing publication footprint
  • Usage in publication:
    • Beacon Flat Formation
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Great Basin province
Publication:

Stewart, J.H., MacMillan, J.R., Nichols, K.M., and Stevens, C.H., 1977, Deep-water upper Paleozoic rocks in north-central Nevada; a study of the type area of the Havallah Formation, IN Stewart, J.H., Stevens, C.H., and Fritsche, A.E., eds., Paleozoic paleogeography of the western United States; Pacific Coast paleogeography symposium I: Society of Economic Paleontologists and Mineralogists, Pacific Section, Pacific Coast Paleogeography Symposium, Bakersfield, CA, April 22, 1977, 1, p. 337-347.


Summary:

Age of the Beacon Flat Formation is Early Permian.

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


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

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