U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Pony Creek shale bed
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Shale
  • AAPG geologic province:
    • Forest City basin
Publication:

Condra, G.E., 1927, The stratigraphy of the Pennsylvanian system in Nebraska: Nebraska Geological Survey Bulletin, 2nd series, no. 1, 291 p., See also "Modern classifications of the Pennsylvanian rocks of eastern Kansas and southeastern Nebraska," compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, USGS unpub. corr. chart, Oct. 1936, sheet 1


Summary:

Pg. 74, 81. Pony Creek shale bed of McKissick Grove shale member of Wabaunsee formation. Top bed of McKissick Grove. Bluish to reddish argillaceous shale, brownish sandy shale, some sandstone. Varies much in color and texture. Thickness 23 feet. Thickens southward. Overlies Dover limestone and underlies Brownville limestone. Age is Late Pennsylvanian (Missouri age). Report includes cross sections, measured sections, geologic maps, stratigraphic tables.
Named from exposures east of Pony Creek, between KS-NE line and 2 mi south of Falls City [in Richardson Co.] southeastern NE.

Source: US geologic names lexicon (USGS Bull. 896, p. 1699); GNC KS-NE Pennsylvanian Corr. Chart, sheet 1, Oct. 1936; supplemental information from GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Pony Creek shale member*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Forest City basin
    • Cherokee basin
Publication:

Moore, R.C., and Mudge, M.R., 1956, Reclassification of some Lower Permian and Upper Pennsylvanian strata in northern Midcontinent, IN Geological notes: American Association of Petroleum Geologists Bulletin, v. 40, no. 9, p. 2271-2278. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Pg. 2273, 2274 (fig. 1). Pony Creek shale member of Wood Siding formation. Included in Wood Siding formation (redefined). Underlies Brownville limestone member; overlies Grayhorse limestone member. Age is Late Pennsylvanian (Virgilian).

Source: US geologic names lexicon (USGS Bull. 1200, p. 3093).


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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).