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Map showing publication footprint
  • Usage in publication:
    • Silver Lake shale bed
  • Modifications:
    • Revised
  • 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. 40, 41, 58. Silver Lake bed of Scranton shale member of Shawnee formation. Named by Beede, is top unit of Scranton shale. Thickness 8 feet in southeastern Nebraska, increasing to 20 feet or more a few miles west of Topeka, eastern Kansas. Overlies Rulo limestone, beneath which is Silver Lake coal. Age is Late Pennsylvanian (Missouri age). Report includes cross sections, measured sections, geologic maps, stratigraphic tables.

Source: US geologic names lexicon (USGS Bull. 896, p. 2000); 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:
    • Silver Lake shale member*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Forest City 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. 2274 (fig. 1), 2275. Silver Lake shale member of Scranton shale. Rank reduced to member status in Scranton shale here reintroduced as a formation with stratigraphic span as assigned to it by Haworth and Bennett (1908). Overlies Rulo limestone member; underlies Burlingame limestone member of Bern limestone (new). Age is Late Pennsylvanian (Virgilian).

Source: US geologic names lexicon (USGS Bull. 1200, p. 3606-2607).


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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