PROGRESSIVE METAMORPHISM AND GRANITIZATION OF THE MAJOR PARAGNEISS, NORTHWEST ADIRONDACK MOUNTAINS, NEW YORK

Abstract

The progressive metamorphism and partial granitization of a belt of quartz-mica feldspar-garnet paragneiss is considered in detail. This paragneiss is traced and sampled along a belt 35 miles long that extends across the Grenville Lowlands into the central massif of the Adirondack Mountains, New York. Geologic thermometers indicate temperatures of metamorphism of about 500° C. at the southwest end of the belt and about 600° C. near the perimeter of the massif.