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Geologic Unit: Clover
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Map showing publication footprint
  • Usage in publication:
    • Clover member
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Kay, G.M., 1944, Middle Ordovician of central Pennsylvania: Journal of Geology, v. 52, no. 1, p. 97-116.


Summary:

Named for Clover Creek, east of Williamsburg, Blair Co., PA. Type section is Pennsylvania Railroad cut, Union Furnace, Huntingdon Co., PA. Consists of principally dense, white-weathering, sublithographic limestone, somewhat magnesian. 50-80 feet thick. Overlies "tiger-stripped" lithology of Loysburg formation; underlies Hatter formation. Age is Middle Ordovician. Publication includes stratigraphic column and map of outcrop areas.

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


Map showing publication footprint
  • Usage in publication:
    • Clover limestone
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Rones, Morris, 1969, A lithostratigraphic, petrographic, and chemical investigation of the lower Middle Ordovician carbonate rocks in central Pennsylvania: Pennsylvania Geological Survey General Geology Report, 4th series, no. 53, 224 p.


Summary:

Revised to Clover limestone of Loysburg Group. Overlies "Tiger-striped" limestone; underlies Hatter limestone. Approximately 80 feet thick. Includes stratigraphic column.

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


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).