Where: Calvert County, Maryland (38.5° N, 76.5° W: paleocoordinates 38.7° N, 73.7° W)

• coordinate estimated from map

When: Calvert Beach Member (Calvert Formation), Serravallian (13.8 - 11.6 Ma)

• he base of bed 14 of the Calvert Formation has been dated to ca. 13.1 Ma (Serravallian) based on strontium dating [48], but was recently reassigned to the late Langhian (ca. 14.5 Ma) based on palaeoclimatic considerations, such as the bed predating the expansion of the East-Antarctic ice sheet around 13.9 Ma [49]. (Marx & Fordyce, 2015)

•

•Zones 14-16A are regarded as Serravallian in age.

• bed-level stratigraphic resolution

Environment/lithology: foreshore; brown, sandy claystone

Size class: macrofossils

Preservation: original phosphate

Reposited in the USNM

Collection methods: surface (in situ),

Primary reference: G. B. Shattuck. 1904. Geological and paleontological relations, with a review of earlier investigations. Maryland Geological Survey Miocene Text xxxiii-clv [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 70828: authorized by Mark Uhen, entered by Mark Uhen on 09.04.2007

Creative Commons license: CC BY (attribution)