Coarse anorthosite

Title

Coarse anorthosite

Identifier

AD-18

Description

This coarse-grained specimen is typical of the massive, homogeneous anorthosite that occurs within the Marcy Massif and underlies the High Peaks region of the Adirondacks. The anorthosite from Route 3 is best represented by analyses 5-L and 8, Table 3, Buddington (1939). Also by analyses A, 16, and 17, Table 4, p. 3 , and by Table 5, p. 32, Buddington (1939).
Thin section shows plagioclase, clinopyroxene and ilmenite.

Date

1980

Contributor

Western Minerals Inc.

Is Part Of

Anorthosite-Charnockite and Metamorphic Suite-Adirondack Mountains, New York

Spatial Coverage

Adirondack Highlands-collected from a massive outcrop on NY Route 3, about 5 miles south of Saranac Lake.

Temporal Coverage

Precambrian

Accrual Method

Purchased from Western Minerals Inc.