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

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