SAMPLE_ID:  69MW1703

DATE: 5/1/2002

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): -57.12

Elevation of the
top of casing (m): 34.50

Total thickness of strata
penetrated by the well (m): 93.27

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