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

Temporal Coverage

Accrual Method

Purchased from Western Minerals Inc.

Number of Thin Sections

1

Geolocation