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  • Usage in publication:
    • Collierstown limestone
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
    • Shale
  • AAPG geologic province:
    • Appalachian basin
Publication:

Cooper, B.N., and Cooper, G.A., 1946, Lower Middle Ordovician stratigraphy of the Shenandoah Valley, Virginia: Geological Society of America Bulletin, v. 57, no. 1, p. 35-113.


Summary:

Named for Collierstown, 8 mi west of Lexington, Rockbridge Co., western VA. In Shenandoah Valley, occurs in westernmost belt of Middle Ordovician limestone, along foot of Little North Mountain; is thicker and more widespread in middle and western belts of James River district. Consists of shell limestone and medium-grained calcarenite with intercalated buff argillaceous limestones and buff shales, some of which are probably metabentonites. Thickness mostly less than 75 ft; is 58 ft at type locality. Overlies Edinburg formation (new); underlies Martinsburg formation. Age is Middle Ordovician.

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 ([ ]).