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

Thin Section of 82MW0017

Photomicrograph of Orthogneiss

$Arrows point to an optically continuous K-feldspar grain separated by quartz-filled fractures in orthogneiss. K-feldspar is stained green in this image, and sodic perthite appears orange.$

Arrows point to an optically continuous K-feldspar grain separated by quartz-filled fractures in orthogneiss (82MW0017). K-feldspar is stained green in this image, and sodic perthite appears orange. Click here for a zip file with full resolution image.

kfs: K-feldspar
qtz: quartz

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