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U.S. Geological Survey Open-File Report 03-221
A Pictorial Survey of the Bedrock Beneath Western Cape Cod, Massachusetts

Thin Section of 95MW0107

Photomicrograph of Granite

Altered plagioclase phenocryst partially recrystallized as fine-grained, unaltered plagioclase in granite. Note later matrix muscovite wrapping non-recrystallized grain.

Altered plagioclase phenocryst partially recrystallized as fine-grained, unaltered plagioclase in granite (95MW0107). Note later matrix muscovite wrapping non-recrystallized grain.  Click here for a zip file with full resolution image.

kfs: K-feldspar
ms: muscovite
pl: plagioclase

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