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Nassau Formation of Potter (1972) - Mettawee member (VTZnm;0)

Geologic Formation in VT, NY, MA

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Lithology

Quartzite

Phyllite

Geologic Age

Neoproterozoic (1000 Ma – 542 Ma ago)

Geologic Unit Label

Znm

Predominantly greenish-gray to pale-lustrous-green chlorite-muscovite-quartz phyllite; and green and purple, bedded and mottled phyllite. Locally contains boudins and thin beds of limestone and pods of pinkish-gray to cream-white dolostone, and minor quartzite. Unit interfingers with the West Castleton Formation above and laterally grades into the Bomoseen Graywacke Member. Also shown as CZnm (Mettawee Member of the Nassau Formation of Potter, 1972). Rocks of the Giddings Brook, Sunset Lake, and Bird Mountain slices. Part of the Taconic Allochthon.

— USGS

Taxonomy

Classified As

Geologic Formation