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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:  82MW0020

DATE: 8/24/2002

Sample: 82MW0020 - Dolomitic Mudrock


Sample 82MW0020 is a dolomitic mudrock composed of layered silicates (~50%), dolomite (20-25%), feldspar (6-10%), quartz (5-10%), opaques (5-10%), and minor calcite veins. Green "specks" may be glauconite. Grain size is very fine. Modal percentages are estimated from x-ray powder diffraction analyses performed by standard methods (Poppe and others, 2001).

Latitude: 41.63887

Longitude: -70.590252

Elevation of well site (m): 36.60

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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