Latitude: 41°18'15"N
Longitude: 74°25'37"W
Ref.: The Geology of Orange Co., Geol. Survey of NY, Reis, Heinrich (1895): 406. Two large, adjacent, igneous intrusive bodies comprised of granite in Precambrian Franklin marble. Rock mass is substantially coarse hornblende granite-gneiss and granite.
The bulk of the Mounts Adam and Eve, two prominent hills that rise above the flat, black dirt onion fields of the Pine Island - Florida, New York area, is underlain by the Mount Eve Granite. The Mt. Eve is an undeformed, post orogenic granite dated at circa 1020 MA. The granite intrudes both the Franklin Marble and related metasedimentary rocks that make ou the rest of this local highland. Where the granite intrudes the Franklin Marble there is a contact aureole that locally contains wollastonite (Volkert, 2004).
Most of the minerals listed for this locality derive from the Franklin Marble and may or may not be related to the granite. One important mineral in the granite was allanite. The rapid weathering of the abundant allanite ended the use of the granite as a building stone in the early 20th century.
Ref: Volkert, R.A., 2004, Mesoproterozoic Rocks of the New Jersey Highlands, North-Central Appalachians: Petrogenesis and Tectonic History, in Tollo, R.P. Corriveau, L., McClelland, J., and Bartholomew, M.J., eds., Protorozoic Tectonic Evolution of the Grenville Orogen in North America: Boulder, Colorado, Geological Soc. of Am. Memoir 197, pg. 697-728.
Mineral List
15 entries listed. 9 valid minerals.
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