Title

Bedrock 24k Louds Island Photo 5

Creator

David P. West Jr.

Preview

Contributing Institution

Maine Geological Survey

Document Type

Image

Identifier

72141

Description

Photo 5: Crystallized commingled magmas in a dike (DScm). Weathering has enhanced the differences between the rock types. The rocks represent a solidified example of darker mafic (gabbro) and lighter felsic (granite) magma that commingled deep underground while still molten. Because of the contrasting viscosity of the two magmas, they behaved as immiscible liquids and did not mix. Although there are numerous Late Silurian examples of these rocks farther down the coast in Maine at St. George, Vinalhaven, and elsewhere, they are rare in the Louds Island quadrangle. West edge of quadrangle, south of Boyd Pond, Bristol.
Project Name: STATEMAP Louds Island Bedrock24k

Exact Creation Date

7-18-2022

Location

Bristol

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.