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Map showing publication footprint
  • Usage in publication:
    • Fort Plain shale member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Ruedemann, Rudolf, 1947, Graptolites of North America: Geological Society of America Memoir, 19, 652 p.


Summary:

Pg. 119. Referred to as Fort Plain shale member of Canajoharie. Underlies Chuctenunda shale member. Age is Middle Ordovician.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1398).


Map showing publication footprint
  • Usage in publication:
    • Fort Plain zone
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Kay, Marshall, 1953, Geology of the Utica quadrangle, New York, with chapter on Silurian System by W.L. Grossman: New York State Museum Bulletin, no. 347, 126 p.


Summary:

Pg. 57-58. Uppermost zone of Fairfield member [of Canajoharie formation]. Composed of silty shale at Canajoharie, but of black shale along West Canada Creek. Underlies Utica shale; overlies rocks of Dolgeville facies in Little Falls and southeastern Utica quadrangles. Thin metabentonite occurs just above contact with Dolgeville in stream south of County Home, Utica quadrangle; thickness of zone here at least 50 feet. Age is Middle Ordovician.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1398).


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 ([ ]).