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<p>Gneiss -- New York (State)<br />Geology -- New York (State)<br />Petrology -- New York (State)<br />Pyrites -- Analysis.</p>
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A Study Of The Genesis Of The Pyritic Gneiss In The Grenville Series, St. Lawrence And Jefferson Counties, New York, Dennis O'Leary
A Study Of The Genesis Of The Pyritic Gneiss In The Grenville Series, St. Lawrence And Jefferson Counties, New York, Dennis O'Leary
Masters Theses
"The pyrite-pyrrhotite belt is a northeast-southwest trending area about 35 miles long and three to four miles wide located in Jefferson and western St. Lawrence counties, New York, within the metamorphosed Grenville Lowland just northwest of the Adirondack massif.
Outcropping within this belt are a number of thin discontinuous quartz-biotite-oligoclase gneisses with an unusually high graphite, chlorite, and pyrite content, known as "rusty gneisses." Sulfides are concentrated in these gneisses into zones of up to 50% or more pyrite. The pyrite is granular or crystalline and is invariably accompanied by large amounts of chlorite and graphite and local minor segregations …