Cram Hill Formation - Coburn Hill Metabasalt member

Light-green, fine- to medium-grained, massive carbonate-biotite-quartz-sphene-chlorite-actinolite-epidote greenstone with deformed pillows; interfingers with the Umbrella Hill Conglomerate Member (Ochuc) and with phyllite-chip conglomerate (Ochsb). Part of the Cram Hill Formation of the Newport Center area. Part of the metasedimentary host rocks of the North River Igneous Suite. Rocks of the Early to Late Taconic Accreted Terrane of the Rowe-Hawley Zone. Eastern allochthonous sequence, oceanic and accretionary realm, ultramafic inclusions, volcanic-arc intrusives, and volcanic rocks.
State Vermont
Name Cram Hill Formation - Coburn Hill Metabasalt member
Geologic age Middle? and Early Ordovician
Lithologic constituents
Major
Metamorphic > Metaigneous > GreenstoneLight-green, fine- to medium-grained, massive carbonate-biotite-quartz-sphene-chlorite-actinolite-epidote greenstone with deformed pillows; metabasalt.
References
NGMDB product
Counties Orleans