Traveler Rhyolite, Black Cat Member

Traveler Rhyolite, Black Cat Member
State Maine
Name Traveler Rhyolite, Black Cat Member
Geologic age Devonian
Lithologic constituents
Major
Igneous > Volcanic > Felsic-volcanic > RhyoliteW - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith T - Rhyolitic volcanic rocks
Comments Consists of dark, rusty-weathering, siliceous, scaly slate or schist, with flaser structure and polymict fragments ranging in size from a few millimeters up to (in ME) several hundred meters. Considered a melange consisting of metasedimentary, felsic and mafic metavolcanic, and ultramafic rocks. Unit description from USGS GEOLEX website (ME078). W - Weakly metamorphosed; contains local occurrences of prehnite and pumpellyite; Protolith E - Feldspathic sandstone
References

Osberg, P.H., Hussey, A.M., and Boone, G.M., 1985, Bedrock geologic map of Maine: Maine Geological Survey, Dept. of Conserv., scale 1:500,000.

NGMDB product
Counties Piscataquis