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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:  03MW0113

DATE: 5/14/1998

Sample: 03MW0113 - Orthogneiss


A foliated orthogneiss, sample 03MW0113 is composed of plagioclase (60%), quartz (15%), biotite (13%), K-feldspar (7%), epidote (3%), chlorite (1%), oxides (1%), and trace muscovite. Plagioclase pophyroblasts (0.05-0.4 mm) are generally untwined and may have overgrown K-feldspar. Fine, granular epidote occurs in the matrix, and is likely an alteration product of mafic minerals.

Latitude: 41.64417

Longitude: -70.54242

Elevation of well site (m): 28.70

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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