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Geologic Unit: Thurman
Map showing publication footprint
  • Usage in publication:
    • Thurman sandstone*
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Conglomerate
    • Sandstone
    • Shale
  • AAPG geologic province:
    • Arkoma basin
Publication:

Taff, J.A., 1899, Geology of the McAlester-Lehigh coal field, Indian Territory, accompanied by a report on the fossil plants by David White, and a report on the Paleozoic invertebrate fossils by G.H. Girty, IN Walcott, C.D., Nineteenth annual report of the United States Geological Survey to the Secretary of the Interior, 1897-1898; Part III, Economic geology: U.S. Geological Survey Annual Report, 19, pt. 3, p. 429-600.


Summary:

Pg. 439. Thurman sandstone. Brown sandstone and shaly beds with, at base, 50 feet or more of conglomerate composed of angular or little-rounded chert fragments in a brown sandstone matrix. Thickness 200 feet. Top formation of Coal Measures. Overlies Boggy shale; underlies Guertie sand. [Mapped (pl. 64) as Shawnee sandstone, but Shawnee being preoccupied, Thurman sandstone is adopted in text.] Age is Pennsylvanian (Allegheny). Report includes geologic map.
Named from former village of Thurman, McAlester coal district, McAlester quadrangle, northern part of Pittsburg Co., (about 6 mi west of Indianola), which is near if not on outcrops of the formation. [According to GNU records (USGS DDS-6; Denver GNULEX, Aug. 1, 1988), type locality not designated.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1935); supplemental information from 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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