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

 Detailed Bedrock Photographskip navbar


SAMPLE_ID:  03MW2147

DATE: 12/11/1998

Sample: 03MW2147 - Granite


A granite, sample 03MW2147 contains plagioclase (35%), quartz (30%), K-feldspar (25%), sericite (4%), muscovite (3%), oxides (2%), and chlorite (1%). Quartz grains show both serrated grain boundaries and recrystallized grains, suggesting partial annealing. Plagioclase grains are altered to sericite and show carlsbad and albite twinning. Perthitic K-feldspar seems to overgrow plagioclase in places. Very pleochroic chlorite probably replaced all biotite. A weak foliation is defined by micas and quartz aggregates.

Latitude: 41.65454

Longitude: -70.55320

Elevation of well site (m): 36.04

Elevation of the upper
bedrock surface (m):

Elevation of the
top of casing (m):

Total thickness of strata
penetrated by the well (m):

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OFR03-221 Home | Introduction | Bedrock Photographs | GIS Data Catalog

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