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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Grand Pitch Formation*
  • Modifications:
    • Named
  • Dominant lithology:
    • Quartzite
    • Slate
  • AAPG geologic province:
    • New England province
Publication:

Neuman, R.B., 1962, The Grand Pitch Formation; new name for the Grand Falls Formation (Cambrian?) in northeastern Maine: American Journal of Science, v. 260, no. 10, p. 794-797.


Summary:

Named for Grand Pitch of East Branch of Penobscot River. Penobscot Co., northeastern ME. Name replaces Grand Falls Formation of Ruedemann and Smith (1935); name was preoccupied. Continuous exposure lines riverbanks for 1000 ft in vicinity of Grand Pitch. At type section, consists of light-greenish-gray, fine-grained quartzite in massive beds interbedded with thinner layers of light-greenish-gray and medium gray slate; and red slate containing OLDHAMIA SMITHI Ruedemann. Proportions of slate increase both upstream and downstream. Age is Cambrian(?); may be as old as late Precambrian and as young as Early Ordovician.

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


Map showing publication footprint
  • Usage in publication:
    • Grand Pitch Formation*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • New England province
Publication:

Rankin, D.W., 1994, Continental margin of the eastern United States; past and present, IN Speed, R.C., ed., Phanerozoic evolution of North American continent-ocean transitions: Geological Society of America, The Decade of North American Geology (DNAG), Continent-Ocean Transect Series, p. 129-218.


Summary:

Used as Grand Pitch Formation of Early Cambrian(?) age. Age follows usage of Neuman (1967, USGS Professional Paper 524-I).

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


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 ([ ]).

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