USGS 17693 (Cretaceous of the United States)

Also known as Clay lens in top of formation, south side of Chesapeake and Delaware canal at station 65+000

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

• coordinate based on political unit

• small collection-level geographic resolution

When: Merchantville Formation, Early/Lower 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 6123: authorized by Matt Kosnik, entered by Matt Kosnik on 28.01.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Nuculida - Nuculidae
Nucula percrassa nut clam
Nucula slackiana (Gabb)
Leionucula ? whitfieldi nut clam
Nucula whitfieldi Weller?
 Nuculanida - Nuculanidae
? Nuculana sp. Link 1807 pointed nut clam
Nuculana ? sp.
 Trigoniida - Trigoniidae
Trigonia sp. Bruguière 1789 clam
Trigonia sp.
 Hiatellida - Hiatellidae
Panopea decisa clam
Panopea decisa Conrad
 Poromyida - Poromyidae
cf. Liopistha protexta Conrad 1853 clam
Liopistha cf. L. protexta (Conrad)
Cymella bella clam
Cymella bella Conrad
 Pholadida - Corbulidae
Caestocorbula crassiplica Gabb 1860 clam
Caesticorbula crassiplica (Gabb)
Parmicorbula sp. Vokes 1944 clam
Parmicorbula sp.
 Cardiida - Gastrochaenidae
Eufistulana sp. Eames 1951 clam
Kummelia sp. - owens
 Cardiida - Arcticidae
cf. Etea carolinensis Conrad 1875 clam
Etea cf. E. carolinensis Conrad
 Cardiida - Veneridae
Legumen concentricum venus clam
Legumen concentricum Stephenson
 Cardiida - Tellinidae
"Linearia metastriata" = Linearis
"Linearia metastriata" = Linearis tellin clam
Linearia metastriata Conrad
 Cardiida - Cardiidae
Granocardium (Granocardium) tenuistriatum Whitfield 1885 cockle
Cardium (Granocardium) tenuistriatum (Whitfield)
Cardium sp. Linnaeus 1758 cockle
Cardium spp.
 Carditida - Astartidae
? Astarte sp. Sowerby 1816 clam
Astarte ? sp.
 Carditida - Crassatellidae
Crassatella sp. Lamarck 1799 clam
Crassatella sp.
 Ostreida - Flemingostreidae
Agerostrea falcata Morton 1827 oyster
Ostrea falcata Morton
 Ostreida - Pinnidae
Pinna laqueata Conrad 1858 oyster
Pinna laqueata Conrad
 Pectinida - Neitheoidae
Neithea quinquecostata Sowerby 1814 scallop
Neithea quinquecostata (Sowerby) of Weller
 Pectinida - Pectinoidae
Camptonectes bellisculptus scallop
Camptonectes bellisculptus (Conrad)
 Myalinida - Inoceramidae
Inoceramus sp. Sowerby 1814 clam
Inoceramus sp.
 Arcida - Cucullaeidae
Cucullaea sp. Lamarck 1801 clam
Idonearca sp. - owens
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium subarctuatum tusk shell
Dentalium subarctuatum Conrad
Gastropoda
 Architaenioglossa - Ampullinidae
Pseudamaura lepta Sohl 1964 snail
Pseudamaura lepta Sohl
 Sorbeoconcha - Naticidae
Gyrodes sp. Conrad 1860 moon snail
Gyrodes sp.
 Sorbeoconcha - Aporrhaidae
Arrhoges (Latiala) sp. Gabb 1868 snail
Arrhoges (Latiala) sp.
Graciliala sp. Sohl 1960 snail
Graciliala sp.
Graciliala johnsoni Stephenson 1923 snail
Graciliala johnsoni (Stephenson)
 Neogastropoda - Paladmetidae
Paladmete sp. n. sp. Gardner 1916 snail
Paladmete n. sp. (Owens et al)
 Cerithioidea - Turritellidae
Laxispira lumbricalis Gabb 1877 turret shell
Laxispira lumbricalis Gabb
Turritella merchantvillensis turret shell
Turritella merchantvillensis Weller
cf. Turritella merchantvillensis turret shell
Turritella cf. T. merchantvillensis Weller
Turritella sp. Lamarck 1799 turret shell
Turritella sp.
 Heterostropha - Acteonidae
Acteon sp. Montfort 1810 snail
Acteon sp.
 Basommatophora - Siphonariidae
cf. Anisomyon borealis Morton 1842 pulmonate
Anisomyon cf. A. borealis (Meek and Hayden)
Cephalopoda
 Ammonitida - Scaphitidae
Scaphites hippocrepis DeKay 1828 ammonite
Scaphites hippocrepis (Dekay)
 Ammonitida - Placenticeratidae
Placenticeras placenta DeKay 1828 ammonite
Placenticeras placenta (Dekay)