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 - 13.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal, silty sandstone

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: L. W. Ward. 1992. Molluscan biostratigraphy of the Miocene Middle Atlantic Coastal Plain of North America. Virginia Museum of Natural History 2 [A. Miller/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 71647: authorized by Mark Uhen, entered by Mark Uhen on 02.05.2007

Creative Commons license: CC BY (attribution)