Calvert Beach Run, south of, Zone 19 (Miocene of the United States)

Where: Calvert County, Maryland (38.5° N, 76.5° W: paleocoordinates 38.6° N, 73.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Boston Cliffs Member (Choptank Formation), Serravallian (13.8 - 11.6 Ma)

• in shell layer of sandy zone 19, about 14 feet above beach level

Environment/lithology: offshore shelf; sandy sandstone

• The Choptank Formation exhibits an offshore middle neritic environment. It is shallow and open-shelf.
• sandy layer

Size class: macrofossils

Collection methods: surface (in situ),

Primary reference: E. C. Case. 1904. Systematic Paleontology: Reptilia. Maryland Geological Survey Miocene: Text 62-70 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13408: authorized by Mark Uhen, entered by Mark Uhen on 14.03.2002, edited by Margaret Shalap

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Neogastropoda - Muricidae
Ecphora quadricostata2 Conrad 1830 murex snail
Bivalvia
 Pectinida - Pectinoidae
Pecten marylandica2, "Pecten madisonius" = Chesapecten madisonius2
"Pecten madisonius" = Chesapecten madisonius2 Say 1824 scallop
 Carditida - Crassatellidae
"Crassatella turgidula" = Marvacrassatella turgidula2
"Crassatella turgidula" = Marvacrassatella turgidula2 Conrad 1843 clam
Mammalia
 Artiodactyla - Tayassuidae
Hesperhys sp.1 Douglass 1903 peccary
 Cetacea -
Halicetus ignotus n. gen. n. sp.2 Kellogg 1969 whale
Thinocetus arthritus2 Kellogg 1969 whale
Aves
 Procellariiformes - Procellariidae
Calonectris sp.3 Mathews and Iredale 1915 shearwater