Lockatong Formation Arkosic Sandstone facies

Cycles in northern Newark basin are thinner and have arkosic sandstone in lower and upper parts. Upper part of formation in northern basin composed mostly of light-gray to light-pinkish-gray or light-brown, coarse- to fine-grained, thick- to massive-bedded arkosic sandstone (Trla). Thermally metamorphosed into hornfels where intruded by diabase (Jd).
State New Jersey
Name Lockatong Formation Arkosic Sandstone facies
Geologic age Upper Triassic
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone > Arkose (Bed)light-gray to light-pinkish-gray or light-brown, coarse- to fine-grained, thick- to massive-bedded arkosic sandstone
Minor
Metamorphic > Granoblastic > Hornfels (Hornfels)Thermally metamorphosed into hornfels where intruded by diabase (Jd)
Comments Newark Supergroup, Brunswick Group (Lyttle and Epstein, 1987). The Lockatong Formation unit description on the map encompasses multiple units (TRl, TRlr, TRla, TRls, and TRlcq). The units were split into separate records and appropriate descriptions for each were used. Names for units are from digital map
References
NGMDB product
Counties Bergen - Hudson