West Jersey Marl Company's Pit, Barnsboro (Navesink) (Cretaceous of the United States)

Also known as Barnesboro

Where: Gloucester County, New Jersey (39.8° N, 75.2° W: paleocoordinates 40.2° N, 50.3° W)

• coordinate estimated from map

When: Navesink Formation (Monmouth Group), Maastrichtian (72.1 - 66.0 Ma)

• At this locality, the most likely source of the specimen is the Maastrichtian Navesink Formation (thanks to Neil Landman for helping with this assessment). (Gaffney et al. 2006, p. 80)

•...examination of the type skull of Bothremys cooki, AMNH 2521, has shown glauconite grains and glauconitic clay remaining as matrix, consistent with either Hornerstown or Navesink Formations. However, the bone of the specimen is dark brown, not the greenish-gray of typical Hornerstown bone. Furthermore, Gallagher (1993) suggested that the bone-producing horizon at Barnsboro was in the Navesink. At present, it seems likely that the type of Bothremys cooki is Maastrichtian rather than Paleocene (Gaffney et al. 2006, p. 83)

• bed-level stratigraphic resolution

Environment/lithology: marginal marine; glauconitic sandstone

• Near-shore marine (Gaffney et al. 2006)
• greensand

Size class: macrofossils

Collected by J. C. Voorhees in 1865

Collection methods: quarrying, surface (in situ),

Primary reference: J. Leidy. 1865. Cretaceous reptiles of the United States. Smithsonian Contributions to Knowledge 192:1-135 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 81999: authorized by Mark Uhen, entered by Mark Uhen on 20.07.2008, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Bothremydidae
"Bothremys cookii n. sp." = Bothremys cooki
"Bothremys cookii n. sp." = Bothremys cooki Leidy 1865 sideneck turtle
AMNH 2521 (originally Rutgers University 1.KV-6 141, 142) the greater portion of a skull, together with the lower jaw. Of the former the occipital region, the auditory passages, the zygomatic arches, and. some other minor parts are lost; of the latter the condyloid. portions are destroyed