U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Geologic Unit: Pearl
Search archives
Map showing publication footprint
  • Usage in publication:
    • Pearl shales
  • Modifications:
    • Original reference
Publication:

Beede, J.W., 1909, Formations of the Marion stage of the Kansas Permian: Kansas Academy of Sciences Transactions, v. 22, p. 248-256., See also "Modern classifications of the Permian rocks of Kansas and Nebraska," compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, USGS unpub. corr. chart, Oct. 1936, 1 sheet; Jour. Geol., v. 17, 1909


Summary:

Pg. 255. Pearl shales. Succession of red, blue, and green shales, 70 feet thick, overlying Herington limestone and underlying Abilene conglomerate. All included in Marion stage.
[Misprint (USGS Bull. 896, p. 1620): cited Kansas Acad. Sci. Trans., v. 21; should be v. 22.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1620-1621).


Map showing publication footprint
  • Usage in publication:
    • Pearl shale
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Salina basin
Publication:

Condra, G.E., and Upp, J.E., 1931, Correlation of the Big Blue series in Nebraska: Nebraska Geological Survey Bulletin, 2nd series, no. 6, 74 p., See also "Modern classifications of the Permian rocks of Kansas and Nebraska," compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, USGS unpub. corr. chart, Oct. 1936, 1 sheet


Summary:

Pearl shale of Sumner group. Includes Hollensberg limestone member (not exposed in Nebraska). Occurs above Herington limestone and below Wellington formation (not exposed in Nebraska), both of Sumner group. Age is Permian (Big Blue).

Source: GNC KS-NE Permian Corr. Chart, Oct. 1936.


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 ([ ]).

Accessibility FOIA Privacy Policies and Notices

USA Gov U.S. Department of the Interior | U.S. Geological Survey
Supported by the National Cooperative Geologic Mapping Program
Page Contact Information: Personnel
Page Last Modified: Thu 04 Apr 2024 04:05:35 PM MDT