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

Thin Section of 27MW0105

Photomicrograph of Granite

Subhedral sphene grain in granite aligned in foliation. Note the subhedral, embayed shape of the sphene grain, and the partial rimming by biotite.

Subhedral sphene grain in granite (27MW0105) aligned in foliation. Note the subhedral, embayed shape of the sphene grain, and the partial rimming by biotite. Click here for a zip file with full resolution image.

bt: biotite
kfs: K-feldspar
pl: plagioclase
qtz: quartz
sph: sphene

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