ammonites
Popes Creek south, Zone 12-13 (Miocene of the United States)

Where: Charles County, Maryland (38.4° N, 77.0° W: paleocoordinates 38.6° N, 73.7° W)

• coordinate estimated from map

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

• group of beds-level stratigraphic resolution

Environment/lithology: marine; sandy claystone

• sparse molluscs, low in diversity; subtropical environment in embayment and dry onshore; area not far from shore

Size class: macrofossils

Preservation: original phosphate

Reposited in the USNM

Collection methods: surface (in situ),

Primary reference: M. D. Uhen. 2007. USNM Chesapeake Group Cetacean Collection Data. [M. Uhen/M. Uhen] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 71809: authorized by Mark Uhen, entered by Mark Uhen on 11.05.2007