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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 28MW0035

Photomicrograph of Amphibolite

Amphibolite showing fine-grained matrix with hornblende and quartz aggregates aligned in foliation. Note the relatively straight grain boundaries of quartz within the aggregates suggesting recrystallization.

Amphibolite (28MW0035) showing fine-grained matrix with hornblende and quartz aggregates aligned in foliation. Note the relatively straight grain boundaries of quartz within the aggregates suggesting recrystallization.  Click here for a zip file with full resolution image.

hbl: hornblende
qtz: quartz.

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