Narragansett Bay Group - Sachuest Arkose (RIPAnbs;0)

State	Rhode Island
Name	Narragansett Bay Group - Sachuest Arkose
Geologic age	Pennsylvanian
Original map label	Pnbs
Comments	Part of Esmond-Dedham Subterrane Narragansett Bay Group - deposited upon older rocks of both West Bay and East Bay parts of the Esmond-Dedham subterrane.
Primary rock type	conglomerate
Secondary rock type	sandstone
Other rock types	phyllite
Lithologic constituents	Major Sedimentary > Clastic > Conglomerate (Bed)gray, smoky-quartz granule-conglomerate; and pebble to cobble conglomerate Sedimentary > Clastic > Sandstone (Bed) Minor Metamorphic > Metasedimentary > Metaclastic > Phylliteinterbedded with black carbonaceous phyllite
Map references	Hermes, O.D., Gromet, L.P., Murray, D.P., Hamidzada, N.A., 1994, Geologic Map of Rhode Island, file name = bedrock_shp.zip (870kb) obtained from Rhode Island Geographic Information System, http://www.edc.uri.edu/rigis-spf/Statewide/state.html#geology , shapefile or interchange file, scale 1/100,000. [http://www.edc.uri.edu/rigis-spf/Statewide/state.html#geology]
Unit references	Hermes, O.D. (comp.), Gromet, L.P. (comp.), Murray, D.P. (comp.), Hamidzada, N.A., Skehan, J.W., and Mosher, S., 1994, Bedrock geologic map of Rhode Island: Rhode Island Map Series No. 1, Kingston, Rhode Island, scale 1: 100,000.
Geographic coverage	Newport