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

Thin Section of 03MW2623

Photomicrograph of Granite

Large K-feldspar grain granite show string perthite. Note the interlocking quartz grains in the matrix.

This is a large K-feldspar grain in granite (03MW2623) showing string perthite. Note the interlocking quartz grains in the matrix. Click here for a zip file with full resolution image.

kfs: K-feldspar
qtz: quartz
pl: plagioclase

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