PBDB Collection

USGS 17718 (Cretaceous of the United States)

Also known as south side of Chesapeake and Delaware canal, 50-1000ft west of Penn Central Railroad's Chesapeake and Delaware canal bridge

Where: Delaware (39.5° N, 75.7° W: paleocoordinates 39.0° N, 45.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Marshalltown Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

Environment/lithology: marine

Reposited in the USGS

• collected by C. W. Carter 1935-7

Primary reference: J. P. Owens, J. P. Minard, N. F. Sohl and F. James Mello. 1970. Stratigraphy of the outcropping post-Magothy Upper Cretaceous formations in Southern New Jersey an Northern Delmarva peninsula, Delaware and Maryland. USGS Professional Paper 674:1-60 [M. Kosnik/M. Kosnik/M. Kosnik]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 6147: authorized by Matt Kosnik, entered by Matt Kosnik on 30.01.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Bivalvia
Ostreida - Gryphaeidae	Exogyra ponderosa, Pycnodonte mutabilis Exogyra ponderosa oyster Exogyra ponderosa Roemer Pycnodonte mutabilis oyster Pyncnodonte mutabilis Morton
Ostreida - Flemingostreidae	Agerostrea falcata Agerostrea falcata Morton 1827 oyster Lopha falcata (Morton)
Pectinida - Anomiidae	cf. Anomia argentaria cf. Anomia argentaria Morton 1833 jingle Anomia cf. A. argentaria Morton
Arcida - Cucullaeidae	cf. Cucullaea tippana cf. Cucullaea tippana Conrad 1858 clam Cucullaea cf. C. tippana Conrad of Weller
Cardiida - Cardiidae	Granocardium (Granocardium) dumosum, Cardium sp. Granocardium (Granocardium) dumosum Conrad 1870 cockle Cardium (Granocardium) dumosum Conrad Cardium sp. Linnaeus 1758 cockle Cardium spp.
Cardiida - Arcticidae	Veniella conradi Veniella conradi Morton 1833 clam Veniella conradi Morton of Weller
Cardiida - Veneridae	Cyprimeria excavata Cyprimeria excavata venus clam Cyprimeria excavata (Morton)
Cardiida - Gastrochaenidae	Gastrochaena sp. Gastrochaena sp. Spengler 1783 clam Gastrochaena sp.
Lucinida - Mactromyidae	cf. Unicardium umbonatum cf. Unicardium umbonatum clam Umbonicardium cf. U. umbonatum (Whitfield)
Trigoniida - Megatrigonioidae	"Scabrotrigonia thoracia" = Pterotrigonia (Scabrotrigonia) "Scabrotrigonia thoracia" = Pterotrigonia (Scabrotrigonia) clam Trigonia thoracia Morton of Weller
Gastropoda
Neogastropoda - Pyropsidae	Pyropsis sp. Pyropsis sp. Conrad 1860 snail Pyropsis sp.
Cerithioidea - Turritellidae	Turritella sp., Laxispira sp. Turritella sp. Lamarck 1799 turret shell Turritella sp. Laxispira sp. Gabb 1877 turret shell Laxispira sp.