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  • Usage in publication:
    • Aquetuck Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Siltstone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Johnsen, J.H., and Southard, J.B., 1962, The Schoharie Formation in southeastern New York, IN Valentine, W.G., ed., Guidebook to field trips: New York State Geological Association Guidebook, 34th annual meeting, Port Jervis, NY, May 4-6, 1962, no. 34, p. A1-A13. [Available online from the New York Geological Association: http://www.nysgaonline.org/newpage2.htm]


Summary:

Informal Aquetuck lithofacies of earlier report assigned formal member status in Schoharie Formation. Composed of calcareous siltstone with minor argillaceous limestone and calcareous sandy mudstone. Chert present within member in upper Mid-Hudson Valley, but diminishes rapidly toward south as subunit becomes vaguely banded and limier. Thickness 30 to 45 ft. Underlies Saugerties Member and overlies Carlisle Center Member (both revised). Passes laterally into Rickard Hill Member (new). Age is Middle Devonian.

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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