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. Assigned to Newark Supergroup (Robinson and Luttrell, 1985).
State Massachusetts
Name New Haven Arkose
Geologic age Lower Jurassic
Lithologic constituents
Major
Sedimentary > Clastic > Siltstone (Bed)brick-red shaley siltstone
Sedimentary > Clastic > Sandstone > Arkose (Bed)red, pink, and gray coarse-grained, locally conglomeratic arkose
Minor
Sedimentary > Clastic > Conglomerate (Bed)
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 separate on printed map; so used for both units. Secondary unit description per MA003 as reported in USGS Geologic Names lexicon (ref. MA024)
References
NGMDB product
Counties Hampden - Hampshire