U.S. Geological Survey Open-File Report 03-221
A Pictorial Survey of the Bedrock Beneath Western Cape
Cod, Massachusetts
![]() Intergrown biotite and hornblende grains in a matrix of altered plagioclase and quartz in an unfoliated amphibolite (81MW0005). Tiny, high relief grains in the matrix are mainly sausserite (epidote) and some sericite. Click here for a zip file with full resolution image. bt: biotite |
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