Where: Calvert County, Maryland (38.7° N, 76.5° W: paleocoordinates 38.9° N, 73.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Plum Point Member (Calvert Formation), Langhian (16.0 - 13.7 Ma)

• Zone 10, Kellogg 1923

• bed-level stratigraphic resolution

Environment/lithology: marine; sandy claystone

Size class: macrofossils

Preservation: original phosphate

Reposited in the USNM

Collection methods: surface (float),

• collected from a block of sediment apparently fallen from the cliff from Zone 10

Primary reference: R. Kellogg. 1923. Description of two squalodonts recently discovered in the Calvert Cliffs, Maryland; and notes on the shark-toothed cetaceans. Proceedings of the U. S. National Museum 62(16):1-69 [M. Uhen/M. Uhen/M. Uhen] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 55517: authorized by Mark Uhen, entered by Mark Uhen on 28.10.2005, edited by Austin Hendy