Skip to main content

Newport Group - Newport Neck Formation

Newport Group - Newport Neck Formation - Sequences of gray, green, and maroon graded rocks, ranging from fine-grained feldspathic granule-conglomerate to maroon slate.
State Rhode Island
Name Newport Group - Newport Neck Formation
Geologic age Late Proterozoic? or older?
Comments Part of Esmond-Dedham Subterrane (East Bay Area)
Primary rock type conglomerate
Secondary rock type slate
Other rock types
Lithologic constituents
Major
Sedimentary > Clastic > Mixed-clastic > Conglomerate-mudstoneSequences of gray, green, and maroon graded rocks, ranging from fine-grained feldspathic granule-conglomerate to maroon slate.
Metamorphic > Metasedimentary > Metaclastic > SlateSequences of gray, green, and maroon graded rocks, ranging from fine-grained feldspathic granule-conglomerate to maroon slate.
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.
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.
Counties Newport