Title

Bedrock Brooks East Photo 4

Creator

Stephen G. Pollock

Preview

Contributing Institution

Maine Geological Survey

Document Type

Image

Identifier

9697

Description

Photo 4: Medium- and coarse-grained granite within weakly layered migmatitic gneiss. On the left side of the image are smaller asymmetric dextral sigmoidal lenses of granite typical of the sheared unit of the Passagassawakeag Gneiss (DOpgs). Lighter colored flecks are smaller grains of feldspar or feldspar and quartz. The granite is interpreted as in situ accumulations of melt. The dominant minerals in the granite are quartz, microcline, and plagioclase. The darker host areas are composed of biotite, quartz, and feldspar ± sillimanite. Garnet is generally not present. Photo approximately 800 feet south of the Brooks East quadrangle, in the Belfast quadrangle near Route 131.
Project Name: Bedrock Geology Brooks East

Exact Creation Date

8-7-2011

Location

Waldo

Supplemental Rights

Credit must be given to the photographer and the Maine Geological Survey when this photo is displayed, reproduced, distributed and/or used in derivative works.