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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Forbes Hill Melange
  • Modifications:
    • Areal extent
    • Revised
  • AAPG geologic province:
    • New England province
Publication:

Thompson, J.B., Jr., 1990, An introduction to the geology and Paleozoic history of the Glens Falls 1 degree x 2 degrees quadrangle, New York, Vermont, and New Hampshire, IN Slack, J.F., ed., Summary results of the Glens Falls CUSMAP project, New York, Vermont, and New Hampshire: U.S. Geological Survey Bulletin, 1887-A, p. A1-A13.


Summary:

Used as Forbes Hill Melange of Fisher (1984) in Glens Falls quad. Ordovician shales contain masses of wildflysch or melange, including Forbes Hill and the Rysedorph Conglomerate, which in turn contain exotic blocks of carbonate rocks, graywackes, and local pillow lava. Ordovician shale underlies Late Proterozoic through Ordovician units of Taconic allochthon. [Use of "Melange" as a rank term is not accepted by USGS.]

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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