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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:  28MW0031

DATE: 1/26/1999

Sample: 28MW0031 - Orthogneiss


Sample 28MW0031 is an orthogneiss with a composition of quartz (33%), plagioclase (29%), K-feldspar (29%), muscovite/sericite (4%), chlorite (2%), oxides (1%), and trace biotite, sphene, epidote and garnet. Fine (0.1-0.4 mm) anhedral quartz grains showing relict igneous textures dominate the matrix. Feldspars in this sample have been considerably altered to sericite and epidote. Garnet is believed to be of igneous origin.

Latitude: 41.62876

Longitude: -70.51356

Elevation of well site (m): 26.15

Elevation of the upper
bedrock surface (m):

Elevation of the
top of casing (m):

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

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