U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Geologic Unit: Lodi
Search archives
Map showing publication footprint
  • Usage in publication:
    • Lodi Limestone Member*
  • Modifications:
    • Overview
    • Areal extent
  • AAPG geologic province:
    • Appalachian basin
Publication:

de Witt, Wallace, Jr., Roen, J.B., and Wallace, L.G., 1993, Stratigraphy of Devonian black shales and associated rocks in the Appalachian basin, IN Roen, J.B., and Kepferle, R.C., eds., Petroleum geology of the Devonian and Mississippian black shale of eastern North America: U.S. Geological Survey Bulletin, 1909-B, p. B1-B57.


Summary:

Along Seneca Lake, near Lodi, in Seneca Co., NY, the Lodi Limestone Member of the Genesee Formation consists of large discoidal limestone nodules intercalated in a bed of dark-gray fossiliferous calcareous siltstone overlying the Geneseo Shale Member. Nodules come together in places to form a lumpy bed of black argillaceous limestone about 6 in. thick. Fauna of the Lodi is distinctive and has been identified in outcrop as far west as eastern Erie Co. Unit increases in thickness to the southwest of Seneca Lake. Used locally for correlation in Allegany and Steuben Cos.

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 ([ ]).