Garnetiferous leucogneiss

Title

Identifier

AD-13

Description

This rock type is characteristic of the light colored layers in the Sacandaga Formation. The mineralogy consists of garnet, feldspar, and quartz. Occasionally, sillimanite and skeletal oxides occur. Both plagioclase and microcline are present. Quartz modes occur as high as 40-50%.
Thin section shows quartz, plagioclase and garnet.

Date

1980

Contributor

Western Minerals Inc.

Is Part Of

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

Spatial Coverage

Adirondack Highlands-collected on NY Route 30 from the west side of a road cut just north of Pumpkin Hollow, 100 yards south of sample AD-12.

Temporal Coverage

Precambrian

Accrual Method

Purchased from Western Minerals Inc.