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Contributing Institution

Maine Geological Survey

Document Type

Image

Identifier

70108

Description

Photo 2: Close up view of books of biotite (black mica) in light-colored quartz-feldspar-rich pegmatite. Pegmatite is a very coarse grained variety of granite and is ubiquitous in the quadrangle, occurring primarily as meter- to sub-meter-wide tabular dikes and sills in surrounding metamorphic rocks. The dikes and sills formed when fluid silica-rich magma flowed up through cracks in the surrounding rocks deep underground and then solidified in place. Grandview Avenue, Boothbay Harbor.
Project Name: STATEMAP Boothbay Harbor Bedrock24k

Exact Creation Date

10-5-2021

Location

Boothbay Harbor

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.

Keywords

bedrock mapping; outcrop; STATEMAP

Image Location

 
COinS