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Geologic Units: Pleasant Lake
Map showing publication footprint
  • Usage in publication:
    • Pleasant Lake Gneiss
  • Modifications:
    • Named
  • Dominant lithology:
    • Gneiss
  • AAPG geologic province:
    • Adirondack uplift
Publication:

Wiener, R.W., McLelland, J.M., Isachsen, Y.W., and Hall, L.M., 1984, Stratigraphy and structural geology of the Adirondack Mountains, New York; review and synthesis, IN Bartholomew, M.J., ed., The Grenville event in the Appalachians and related topics: Geological Society of America Special Paper, 194, p. 1-55.


Summary:

Gray hornblende-biotite-quartz-plagioclase gneiss with basal quartzite, previously named the Major Gneiss by Lewis (1969), is here named the Pleasant Lake Gneiss of the Oswegatchie Group in the Northwest Lowlands of the Adirondacks, NY. Overlies the Gouverneur Marble of the Oswegatchie. Maximum thickness is 1,050 m. Age is Proterozoic.

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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