Narragansett Bay Group - Pondville Conglomerate (RIPAnbpo;0)

State	Rhode Island
Name	Narragansett Bay Group - Pondville Conglomerate
Geologic age	Pennsylvanian
Original map label	Pnbpo
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	arenite
Other rock types	slate; siltstone; arkose
Lithologic constituents	Major Sedimentary > Clastic > Conglomerate (Bed)gray to greenish conglomerate with sand-sized matrix; At type locality (Pondville Station, Massachusetts) unit consists of quartzite-pebble conglomerate Sedimentary > Clastic > Sandstone > Arenite (Bed)interbedded with quartz arenite and litharenite; typically lenticular and discontinuous Incidental Sedimentary > Clastic > Sandstone > Arkoseat type locality (Pondville Station, Massachusetts) Metamorphic > Metasedimentary > Metaclastic > Slateat type locality (Pondville Station, Massachusetts), unit consists of interbedded red and green slate Sedimentary > Clastic > Siltstoneat type locality (Pondville Station, Massachusetts)
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	Kent - Providence