Dighton Conglomerate

Coarse conglomerate having sandy matrix; minor sandstone. Dighton Conglomerate occurs in Narragansett basin. Consists of gray conglomerate composed mainly of rounded quartzite cobbles to boulders containing subordinate rounded granite cobbles and slate pebbles; very little sand matrix; lenses of medium-grained sandstone form less than 20 percent of unit. Age is Pennsylvanian (Goldsmith, 1991).
State Massachusetts
Name Dighton Conglomerate
Geologic age Upper Pennsylvanian
Lithologic constituents
Sedimentary > Clastic > ConglomerateCoarse conglomerate having sandy matrix.
Sedimentary > Clastic > Sandstone
Comments Part of Milford-Dedham Zone (Tertiary and Older Rocks). Secondary unit description per MA023.
NGMDB product
Counties Bristol