Hornerstown Formation

Hornerstown/Vincentown Formations

Sea level continued to be very high during the Paleocene and the Paleocene section is generally thin. The Hornerstown Formation was deposited in the lower Paleocene. In outcrop, the Hornerstown is glauconite sand ith a conc entration of the fossil Oleneothyris harleni near the top. Down dip, in cores, the Hornerstown is dark greenish gray, very clayey glauconite sand to micaceous, quartzose, glauconite sand. The Vincentown Formation is slightly glauconitic quartz sand and silt. In places the Vincentown is very fossiliferous consisting of a bryozoan bioherm. In addition, there is an unnamed clay member of the Vincentown Formation that spans the Paleocene/Eocene boundary. This kaolinitic clay unit contains evidence for the Paleocene-Eocene thermal maximum (Cramer, et al., 1999).

Hornerstown Formation from the Millville corehole (approx. 970 ft), consisting of silghtly fossiliferous andbioturbated, glauconite sand, clay.

Hornerstown Formation, consisting of glauconite sand, near Runnemead.

Vincentown Formation near Eatontown.

Unnamed clay member of the Vincentown Formation from the Millville corehole (approx. 880 ft).