Bedrock 24k Louds Island Photo 11

• Main Author: West, David P, Jr.
• Format: Text
• Language: unknown
• Published: Digital Maine 2022
• Subjects: bedrock mapping; outcrop; STATEMAP; Louds Island; Geology; Greenland
• Online Access: https://digitalmaine.com/mgs_geologic_field_photos/22080; https://digitalmaine.com/context/mgs_geologic_field_photos/article/23079/type/native/viewcontent/72147.JPG

Photo 11: Deformed migmatite from the migmatitic pelitic schist member of the Bucksport Formation (Sbmp). The darker colored layers are sillimanite-bearing, biotite-rich mica schist (metamorphic rock) and the lighter colored portions of the rock are granite (igneous rock). The term migmatite refers to a composite rock that contains both residual metamorphic rocks, and igneous rocks that may have formed during episodes of partial melting of the surrounding metamorphic rocks. Sillimanite is an aluminous metamorphic index mineral whose presence indicates these rocks were once heated to over 900°F during metamorphism. East side of Greenland Cove, Bremen. Project Name: STATEMAP Louds Island Bedrock24k https://digitalmaine.com/mgs_geologic_field_photos/23079/thumbnail.jpg