ammonites
Waln marl pit, Hornerstown (Cretaceous of the United States)

Where: Monmouth County, New Jersey (40.1° N, 74.6° W: paleocoordinates 40.4° N, 50.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Navesink/Hornerstown Formation, Maastrichtian (70.6 - 65.5 Ma)

• basal Hornerstown or Navesink Fm.; "middle marl beds"

• bed-level stratigraphic resolution

Environment/lithology: marginal marine; marl

Size class: macrofossils

Collected by N. Waln; reposited in the YPM

Primary reference: O. C. Marsh. 1870. Notice of some fossil birds, from the Cretaceous and Tertiary formations of the United States. American Journal of Science and Arts, series 2 49(145):205-217 [M. Uhen/M. Uhen/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 87905: authorized by Matt Carrano, entered by Matt Carrano on 27.03.2009