Where: Prince George's County, Maryland (38.8° N, 77.0° W: paleocoordinates 39.7° N, 52.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Severn Formation, Maastrichtian (72.1 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithology not reported

Size classes: macrofossils, mesofossils

Collected by R. Johnson; reposited in the USNM

Primary reference: D. Baird. 1986. Upper Cretaceous reptiles from the Severn Formation of Maryland. The Mosasaur 3:63-85 [J. Alroy/M. Sommers/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27567: authorized by John Alroy, entered by John Alroy on 11.12.2002

Creative Commons license: CC BY (attribution)