U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Clarence Member*
  • Modifications:
    • Revised
    • Overview
  • Dominant lithology:
    • Limestone
    • Chert
  • AAPG geologic province:
    • Appalachian basin
Publication:

Oliver, W.A., Jr., 1966, Clarence Member of the Onondaga Limestone, IN Cohee, G.V., and West, W.S., eds., Changes in stratigraphic nomenclature by the U.S. Geological Survey, 1965: U.S. Geological Survey Bulletin, 1244-A, p. A48-A49.


Summary:

Clarence Member of Onondaga Formation of Ozol (1964, unpub. Ph.D thesis) is revised as member of Onondaga Limestone. Replaces term "western (black chert) facies of Nedrow Member" of Oliver (1954). Type section is at village of Clarence, Erie Co., western NY. Consists of sparsely fossiliferous fine-grained limestone and dark-gray chert. Dunn and Ozol (1962) report chert content of 45 to 75 percent, compared to 5 to 20 percent for underlying members. Occupies same stratigraphic position as Nedrow Member in central and eastern NY. Both Clarence and Nedrow are underlain by Edgecliff Member and overlain by Moorehouse Member. Nedrow consists of argillaceous limestone with abundant brachiopods and platyceratid gastropods.

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


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

Brett, C.E., and Ver Straeten, C.A., 1994, Stratigraphy and facies relationships of the Eifelian Onondaga Limestone (Middle Devonian) in western and central New York State, IN Brett, C.E., and Scatterday, James, eds., Field trip guidebook: New York State Geological Association Guidebook, 66th annual meeting, Rochester, NY, no. 66, p. 221-321.


Summary:

Authors informally propose two dominant, widespread facies of the Edgecliff Member of the Onondaga Limestone: the cherty, micritic Clarence facies, formerly known as the Clarence Member of western NY, and a coarse crinoidal, non- to sparsely cherty Jamesville Quarry facies. Clarence facies is present and relatively thick from Oaks Corners westward to Buffalo. It is a very minor component of the Edgecliff interval from Seneca Falls eastward to Albany, but south of Albany, along the Hudson Valley, a thick micritic, light-weathering, cherty facies reappears with the Edgecliff and into the Buttermilk Falls Formation in northeastern PA.

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 ([ ]).