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Geologic Unit: DeKoven
Map showing publication footprint
  • Usage in publication:
    • DeKoven cyclothem
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Illinois basin
Publication:

Wanless, H.R., 1955, Pennsylvanian rocks of Eastern Interior basin: American Association of Petroleum Geologists Bulletin, v. 39, no. 9, p. 1753-1820.


Summary:

Pg. 1764 (table 2). DeKoven cyclothem in Tradewater group. In list of cyclothems in southern Illinois, the DeKoven occurs at top of Tradewater group and overlies Davis cyclothem. Age is Pennsylvanian.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1076-1077).


Map showing publication footprint
  • Usage in publication:
    • DeKoven cyclothem
  • Modifications:
    • Principal reference
  • AAPG geologic province:
    • Illinois basin
Publication:

Wanless, H.R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956, [with Correlation chart compiled by Raymond Siever]: Illinois Geological Survey Circular, no. 217, 14 p.


Summary:

Pg. 5, 10, pl. 1. DeKoven cyclothem. Includes DeKoven coal. Stratigraphically below Liverpool cyclothem; overlies Colbert cyclothem (formerly termed Davis). Age is Pennsylvanian. Type locality designated.
Type locality: near DeKoven Station, Union Co., KY.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1076-1077).


Map showing publication footprint
  • Usage in publication:
    • DeKoven cyclothem
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Illinois basin
Publication:

Kosanke, R.M., Simon, J.A., Wanless, H.R., and Willman, H.B., 1960, Classification of the Pennsylvanian strata of Illinois: Illinois Geological Survey Report of Investigations, no. 214, 84 p.


Summary:

Pg. 54 (table 3). DeKoven cyclothem in Spoon formation (new) of Kewanee group (new). Included in Spoon formation. Age is Pennsylvanian. Presentation of new rock-stratigraphic classification of Pennsylvanian strata in Illinois. Cyclothemic classification retained but is independent of rock-stratigraphic classification.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1076-1077).


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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