SAMPLE_ID:  82MW0015

DATE: 3/24/2001

ORTHOGNEISS

Sample 82MW0015 is a fine-grained orthogneiss composed of plagioclase (35%), K-feldspar (30%), quartz (30%), biotite (4%), and trace muscovite, oxides, and sphene. Relatively small plagioclase porphyroclasts reach 3.5 mm. Alteration and recrystallization is extreme in seritized K-feldspar. Relict 8 mm-long K-feldspar porphyroclasts have totally recrystallized, but are still wrapped by biotite. A foliation is defined by micas and banding of felsic minerals.

Latitude: 41.63611

Longitude: -70.59678

Elevation of well site (m): 37.44

Elevation of the upper
bedrock surface (m): -70.76

Elevation of the
top of casing (m): 37.29

Total thickness of strata
penetrated by the well (m): 111.25

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