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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Clay City siltstone member
  • Modifications:
    • Named
  • Dominant lithology:
    • Siltstone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Stockdale, P.B., 1939, Lower Mississippian rocks of the east-central interior [Indiana, Kentucky, Ohio]: Geological Society of America Special Paper, 22, 248 p.


Summary:

Named as a member of New Providence formation, Stanton facies (new). Named for Clay City, Powell Co., central KY. Consists of a thin persistent calcareous siltstone 1.5 to 5 ft thick above base of New Providence formation. Thickness is 6 in. to 3 ft. In some areas, overlies Henley shale member. [Age is Early Mississippian.]

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Clay City Bed*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Weir, G.W., 1976, Geologic map of the Means quadrangle, east-central Kentucky: U.S. Geological Survey Geologic Quadrangle Map, GQ-1324, 1 sheet, scale 1:24,000 [http://ngmdb.usgs.gov/Prodesc/proddesc_10859.htm]


Summary:

Clay City Siltstone Member of New Providence Formation of Stockdale (1939) revised as Clay City Bed and assigned to the Farmers Member of the Borden Formation. Age is Early Mississippian.

Source: GNU records (USGS DDS-6; Reston GNULEX).


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 ([ ]).