SAMPLE_ID:  80MW0001

DATE: 5/3/2001

ORTHOGNEISS

An orthogneiss, sample 80MW0001 contains plagioclase (45%), K-feldspar (40%), quartz (8%), chlorite (3%), muscovite (2%), oxides (1%), and trace biotite. Biotite has been almost completely replaced by chlorite. Plagioclase shows a variable grain size and albite twinning in some, but not all, porphyroclasts. Calcite veins crosscut the foliation and are not included in modal estimates.

Latitude: 41.63639

Longitude: -70.58239

Elevation of well site (m): 32.41

Elevation of the upper
bedrock surface (m):-73.66

Elevation of the
top of casing (m): 32.28

Total thickness of strata
penetrated by the well (m): 106.68

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