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Geologic Unit: Bankston Fork
Map showing publication footprint
  • Usage in publication:
    • Bankston Fork cyclothem
  • Modifications:
    • Original reference
  • AAPG geologic province:
    • Illinois basin
Publication:

Weller, J.M., 1942, Rhythms in Upper Pennsylvanian cyclothems: Illinois Academy of Science Transactions, v. 35, no. 2, p. 145-146.


Summary:

Pg. 145 (table 1). Bankston Fork cyclothem. In list of Upper Pennsylvanian cyclothems, Bankston Fork occurs below Sparland cyclothem and above Jamestown cyclothem (new).
Type locality not stated, however, type locality of Bankston Fork limestone is in Saline Co., IL.

Source: US geologic names lexicon (USGS Bull. 1200, p. 210-211).


Map showing publication footprint
  • Usage in publication:
    • Bankston cyclothem
  • Modifications:
    • Overview
  • 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. 11, pl. 1. Bankston cyclothem. On correlation chart Bankston cyclothem is shown as including (ascending) Anvil Rock sandstone, Bankston Fork limestone, and Bankston coal. Underlies Cutler cyclothem (new); overlies Jamestown cyclothem. Age is Pennsylvanian.

Source: US geologic names lexicon (USGS Bull. 1200, p. 210-211).


Map showing publication footprint
  • Usage in publication:
    • Bankston Fork 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. 52 (table 2), 54 (table 3). Bankston Fork cyclothem [listed as Bankston cyclothem on pl. 1]. Recognized in southwestern and southeastern Illinois. Occurs above Jamestown cyclothem and below Cutler cyclothem. Age is Pennsylvanian. Report presents new rock-stratigraphic classification of Pennsylvanian of Illinois. Cyclical classification is retained but is independent of rock-stratigraphic classification; includes rocks also assigned to Carbondale formation of Kewanee group (new).

Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 210-211).


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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