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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:  69MW1703

DATE: 5/1/2002

Sample: 69MW1703 - Orthogneiss


An orthogneiss, sample 69MW1703 contains K-feldspar (35%), plagioclase (30%), quartz (25%), biotite (8%), oxides (2%), and trace epidote. Thin gneissic banding occurs throughout. K-feldspar porphyroclasts are up to 10mm in length and wrapped by biotite. Abundant oxides often fill fractures, suggesting hydrothermal alteration.

Latitude: 41.64736

Longitude: -70.58779

Elevation of well site (m): 34.63

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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