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  • Usage in publication:
    • Ferguson gypsum member
  • Modifications:
    • Named
  • Dominant lithology:
    • Gypsum
  • AAPG geologic province:
    • Anadarko basin
Publication:

Gould, C.N., 1902, General geology of Oklahoma: Oklahoma Department of Geology and Natural History Biennial Report, no. 2, p. 17-68.


Summary:

Named for town of Ferguson, Blaine Co, OK, lowermost heavy gypsum ledge of Blaine division (new), in Anadarko basin. No type locality designated. Varies from white to dirty brown. Exact thickness not stated. Thickest in Canadian, Kingfisher, and southern Blaine Cos; thins north and disappears near Glass Mountains of TX. Ferguson overlies Norman division (new); underlies Magpie dolomite member (new) of Blaine division. Forms a conspicuous ledge. Permian age.

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


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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