New Haven Arkose

Red, pink, and gray coarse-grained, locally conglomeratic arkose interbedded with brick-red shaley siltstone and fine-grained arkosic sandstone; boundary between Lower Jurassic (Jn) and Upper Triassic (TRn) parts is arbitrarily drawn through clastic rocks of similar lithology below gray mudstone containing Lower Jurassic palynofloral zone; TRn is continuous with and lithically similar to TRs near Northampton. Assigned to Newark Supergroup (Robinson and Luttrell, 1985).
State Massachusetts
Name New Haven Arkose
Geologic age Upper Triassic
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone > Arkose (Bed)red, pink, and gray coarse-grained, locally conglomeratic arkose
Sedimentary > Clastic > Siltstone (Bed)brick-red shaley siltstone
Sedimentary > Clastic > Sandstone (Bed, Arkosic)fine-grained arkosic sandstone
Minor
Sedimentary > Clastic > Mudstone (Bed)
Comments Part of Mesozoic Basins (Jurassic and Triassic Rocks); Sedimentary and Volcanic Rocks of Hartford Basin. Description for Jn and TRN are combined and hard to seperate on printed map; so used for both units. Secondary unit description per MA003.
References
NGMDB product
Counties Franklin - Hampden - Hampshire