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WEATHER
Southbridge Formation (CTSOs;0)
Geologic Formation
in
CT
,
MA
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Lithology
Amphibolite
Granofels
Schist
Geologic Age
Neoproterozoic (1000 Ma – 542 Ma ago)
Geologic Unit Label
SOs
Dark- to light-gray, locally rusty, fine- to medium-grained interlayered granofels and schist, composed of quartz, plagioclase, and biotite, with muscovite in schist, and amphibole, calc-silicate minerals, K-feldspar in certain layers; also locally mappable units and thinner layers of calc-silicate rock, amphibolite, and sillimanite-garnet and sillimanite-graphite-pyrrhotite schist.
—
USGS
Taxonomy
Classified As
Geologic Formation
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