Woolen Mill gabbro

Title

Woolen Mill gabbro

Identifier

AD-23

Description

This specimen is representative of the pyroxene-plagioclase granulites that form from gabbros in the Adirondacks. This famous locality has been discussed, with analyses, by Buddington, 1939, Analysis 64L Table 15, and also in deWaard's 1965 type locality for the almandine-clinopyroxene subfacies of the granulite facies. The mineralogy is garnet-oligoclase-clinopyroxene-opaques. The texture is granoblastic. The original igneous texture and mineralogy have been totally replaced, at least locally, by two pyroxenes and plagioclase.

Thin section shows garnet, plagioclase and clinopyroxene.

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 road cut on NY Route 9N, i mile west of Elizabethtown.

Temporal Coverage

Precambrian

Accrual Method

Purchased from Western Minerals Inc.