Where: Charles County, Maryland (38.5° N, 76.7° W: paleocoordinates 38.8° N, 73.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Calvert Formation (Chesapeake Group), Burdigalian to Burdigalian (20.4 - 11.6 Ma)

Environment/lithology: marine; marl

Size class: macrofossils

Preservation: original phosphate

Reposited in the USNM

Primary reference: R. Kellogg. 1955. Three Miocene porpoises from the Calvert Cliffs, Maryland. Proceedings of the United States National Museum 105(3354):101-154 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45510: authorized by Mark Uhen, entered by Mark Uhen on 26.10.2004

Creative Commons license: CC BY (attribution)