spoil piles, St. Georges (Merchantville Formation) (Cretaceous of the United States)

Also known as Chesapeake and Delaware Canal

Where: Maryland (39.6° N, 75.7° W: paleocoordinates 39.0° N, 45.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Merchantville Formation (Matawan Group), Early/Lower Campanian (83.5 - 70.6 Ma)

• formation-level stratigraphic resolution

Environment/lithology: coastal; glauconitic, micaceous, blue siltstone

• "open marine, shallow water environment"
• "dark gray and blue, micaceous, glauconitic silt and find sand"

Size class: macrofossils

Primary reference: E. M. Lauginiger. 1984. An Upper Campanian vertebrate fauna from the Chesapeake and Delaware Canal, Delaware. The Mosasaur 2:141-149 [J. Alroy/M. Sommers]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 27571: authorized by John Alroy, entered by John Alroy on 11.12.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• list is of taxa separated from the Marshalltown Formation list on a priori grounds
Show authors, comments, and common names
Malacostraca
 Decapoda - Nephropidae
Hoploparia gladiator
Hoploparia gladiator Pilsbry 1901 clawed lobster
 Decapoda - Callianassidae
Protocallianassa mortoni
Protocallianassa mortoni Rathbun 1935 decapod
Cephalopoda
 Ammonitida - Collignoniceratidae
Menabites delawarensis
Menabites delawarensis Morton 1830 ammonite
 Ammonitida - Placenticeratidae
Placenticeras placenta
Placenticeras placenta DeKay 1828 ammonite