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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:  27MW0102

DATE: 8/17/1998

Sample: 27MW0102 - Orthogneiss


An augen orthogneiss, sample 27MW0102 consists of K-feldspar (40%), plagioclase (31%), quartz (25%), biotite (2%), and trace amounts of muscovite, sphene, epidote, chlorite, and oxides. Grains of plagioclase are entirely recrystallized, while K-feldspar porphyroclasts are in tact and wrapped by biotite. A foliation is defined by biotite and elongated aggregates of quartz and plagioclase.

Latitude: 41.66111

Longitude: -70.58637

Elevation of well site (m): 72.18

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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