Where: Calvert County, Maryland (38.7° N, 76.5° W: paleocoordinates 38.9° N, 72.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Calvert Formation (Chesapeake Group), Burdigalian (20.4 - 16.0 Ma)

• from Shattuck's zones 3 to 5, zone 6 added from Kellogg 1923

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; diatomaceous, green, sandy siltstone

Size class: macrofossils

Preservation: original phosphate

Reposited in the USNM

Collection methods: surface (in situ),

Primary reference: F. W. True. 1912. Description of a new fossil porpoise of the genus Delphinodon from the Miocene formation of Maryland. Journal of the Academy of Natural Sciences of Philadelphia 2:165-194 [M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45493: authorized by Mark Uhen, entered by Mark Uhen on 25.10.2004

Creative Commons license: CC BY (attribution)