Jones Wharf, Zone 19 (Miocene of the United States)

Also known as Drumcliff

Where: St. Mary's County, Maryland (38.4° N, 76.6° W: paleocoordinates 38.6° N, 73.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

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

Environment/lithology: offshore; green claystone

• Open shelf conditions created channel deposits of clean, medium-size sand, and allowed for abundant growth of molluscan fauna and subsequent cirriped development; very dense shell accumulation, shallow neritic open-shelf
• greenish clay

Size class: macrofossils

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 70855: authorized by Mark Uhen, entered by Mark Uhen on 09.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Arcidae
 Pectinida - Pectinoidae
"Chesapecten nefrens" = Chesapecten (Chesapecten) nefrens2, "Pecten madisonius" = Chesapecten madisonius
"Chesapecten nefrens" = Chesapecten (Chesapecten) nefrens2 Ward and Blackwlder 1975 scallop
"Pecten madisonius" = Chesapecten madisonius Say 1824 scallop
 Ostreida - Ostreidae
Ostrea carolinensis Conrad 1832 oyster
 Lucinida - Lucinidae
 Cardiida - Veneridae
Macrocallista marylandica2 Conrad 1833 venus clam
 Cardiida - Cardiidae
"Cardium laqueatum" = Chesacardium laqueatum
"Cardium laqueatum" = Chesacardium laqueatum Conrad 1830 cockle
 Hiatellida - Hiatellidae
Panopea americana Conrad 1838 clam
 Carditida - Astartidae
Astarte obruta2 Conrad 1834 clam
 Carditida - Crassatellidae
Thecostraca
 Balanomorpha - Balanidae
"Balanus concavus" = Concavus concavus
"Balanus concavus" = Concavus concavus Bronn 1831 barnacle
Mammalia
 Cetacea -
Aglaocetus sp.1 Kellogg 1934 whale