U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Geologic Unit: Pequanac
Map showing publication footprint
  • Usage in publication:
    • Pequanac shale*
  • Modifications:
    • Named
  • Dominant lithology:
    • Shale
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Kummel, H.B., 1908, Paleozoic sedimentary rocks, IN Spencer, A.C., and others, Description of [the] Franklin Furnace quadrangle, New Jersey: U.S. Geological Survey Geologic Atlas of the United States Folio, Franklin Furnace folio, no. 161, p. 10-12.


Summary:

Pequanac shale. Introduced to replace "Monroe shale" [preoccupied] of reports of the New Jersey Geol. Survey. Extensively developed along upper Pequanac [Pequannac] River. Thickness 1,000 feet. Overlies Kanouse sandstone. Contains Hamilton fossils.

Source: US geologic names lexicon (USGS Bull. 896, p. 1638).


Map showing publication footprint
  • Usage in publication:
    • Pequanac shale†
  • Modifications:
    • Abandoned
  • AAPG geologic province:
    • Piedmont-Blue Ridge province
Publication:

Wilmarth, M.G., 1930, [Selected Geologic Names Committee remarks (ca. 1901-1930) on Paleozoic rocks of the Appalachians], IN Wilmarth, M.G., 1938, Lexicon of geologic names of the United States (including Alaska): U.S. Geological Survey Bulletin, 896, pts. 1-2, 2396 p.


Summary:

Cornwall shale having been published in 1907, as a name to replace "Monroe shales" in New York, the name "Pequanac" was in 1914 (USGS Raritan folio, no. 191) discarded in favor of Cornwall shale, now [ca. 1938] in use in both States.

Source: US geologic names lexicon (USGS Bull. 896, p. 1638).


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 ([ ]).

Accessibility FOIA Privacy Policies and Notices

USA Gov U.S. Department of the Interior | U.S. Geological Survey
Supported by the National Cooperative Geologic Mapping Program
Page Contact Information: Personnel
Page Last Modified: Thu 04 Apr 2024 03:28:59 PM MDT