USGS 310, Dawson Bluff (Cretaceous of the United States)

Also known as Sohl and Koch OFR # 139

Where: Wilcox County, Alabama (32.0° N, 87.3° W: paleocoordinates 35.4° N, 65.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Discoscaphites conradi ammonoid zone, lower Member (Prairie Bluff Formation), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• Haustator bilira assemblage zone

• member-level stratigraphic resolution

Environment/lithology: lithified, silty, sandy lime mudstone

Size class: mesofossils

Preservation: original calcite, replaced with calcite

Collected by L.C. Johnson; reposited in the USNM

• Stephenson pub 1914

Primary reference: N. F. Sohl and C. F. Koch. 1983. Upper Cretaceous (Maestrichtian) Mollusca from the Haustator bilira Assemblage Zone in the East Gulf Coastal Plain. USGS Open File Report 83-451:1-239 [M. Kosnik/M. Kosnik/M. Uhen]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 4206: authorized by Matt Kosnik, entered by Matt Kosnik on 14.08.1999, edited by Uta Merkel

Creative Commons license: CC BY (attribution)

Taxonomic list

 Terebratulida - Cancellothyrididae
Terebratulina floridana
Terebratulina floridana (Morton)
 Sabellida - Serpulidae
Serpula sp. Linnaeus 1758
Serpula sp.
 Arcida - Glycymerididae
Glycymeris sp. Da Costa 1778 clam
Glycymeris sp.
 Arcida - Cucullaeidae
Cucullaea (Idonearca) cf. powersi clam
Cucullaea (Idonearca) cf. I. powersi - originally entered as "Cucullaea cf. powersi"
"Cucullaea (Idonearca) capax" = Idonearca capax Conrad 1858 clam
Cucullaea (Idonearca) capax Conrad
Cucullaea (Idonearca) littlei Gabb 1877 clam
Cucullaea (Idonearca) littlei Gabb
 Pectinida - Pectinoidae
Neithea (Neitheops) quinquecostata Sowerby 1814 scallop
Neithea (Neitheops) quinquecostata
 Pectinida - Plicatulidae
Plicatula (Plicatula) mullicaensis scallop
Plicatula (Plicatula) mullicaensis
 Pectinida - Anomiidae
Anomia (Anomia) argentaria Morton 1833 jingle
Anomia (Anomia) argentaria Morton
 Ostreida - Gryphaeidae
Pycnodonte vesicularis Lamarck 1806 oyster
Pycnodonte vesicularis Lamarck
"Exogyra costata" = Exogyra (Exogyra) costata Say 1971 oyster
Exogyra costata Say
Gryphaeostrea vomer Morton 1828 oyster
Gryphaeostrea vomer Morton
 Ostreida - Ostreidae
Arctostrea falacata oyster
Arctostrea falacata (Gabb)
 Carditida - Crassatellidae
Crassatella sp. Lamarck 1799 clam
Crassatella sp.
Crassatella vadosa Morton 1834 clam
Crassatella vadosa vadosa Morton
 Pholadida - Corbulidae
Caestocorbula (Caesticorbula) crassaplica Vincent 1910 clam
Caesticorbula (Caesticorbula) cras - originally entered as "Caesticorbula crassaplica"
 Cardiida - Arcticidae
Veniella conradi Morton 1833 clam
Veniella conradi (Morton)
 Cardiida - Cardiidae
Cardium sp. Linnaeus 1758 cockle
Cardium sp.
Protocardia (Pachycardium) spillmani cockle
Protocardium (Pachycardium) spillm - originally entered as "Protocardium spillmani"
 Poromyida - Poromyidae
Liopistha protexta Conrad 1853 clam
Liopistha protexta Conrad
 Trigoniida - Megatrigonioidae
Pterotrigonia (Scabrotrigonia) thoracica Morton 1834 clam
Pterotrigonia (Scabrotrigonia) tho
 Prosobranchia -
Neogastropoda indet. Thiele 1929 snail
Neogastropods indeterminate
 Neogastropoda - Melongenidae
Pyrifusus sp. Conrad 1858 snail
Pyrifusus sp.
 Neogastropoda - Fasciolariidae
Bellifusus sp. Stephenson 1941 snail
Bellifusus sp.
Drilluta sp. Wade 1916 snail
Drilluta sp.
Graphidula sp. Stephenson 1941 snail
Graphidula sp.
 Neogastropoda - Pholidotomidae
Medionapus sp. Stephenson 1941 snail
Medionapus sp.
 Neogastropoda - Volutidae
Longoconcha sp. Stephenson 1941 volute
Longoconcha spp.
 Neogastropoda - Tudiclidae
Pyropsis sp. Conrad 1860 snail
Pyropsis spp.
 Neogastropoda - Turbinellidae
Napulus sp. Stephenson 1941 snail
Napulus sp.
 Stromboidea - Aporrhaidae
Anchura ? noakensis snail
Anchura noakensis? Stephenson - originally entered as "Anchura noakensis ?"
 Naticoidea - Naticidae
Gyrodes abyssinus moon snail
Gyrodes abyssinus (Morton)
Gyrodes petrosus moon snail
Gyrodes petrosus (Morton)
 Xenophoroidea - Xenophoridae
"Xenophora leprosa" = Xenophora (Endoptygma) leprosa
"Xenophora leprosa" = Xenophora (Endoptygma) leprosa Morton 1834 carrier shell
Xenophora leprosa (Morton)
 Sorbeoconcha - Turritellidae
Turritella sp., Turritella vertebroides, "Turritella (Sohlitella) trilira" = Turritella trilira
Turritella sp. Lamarck 1799 turret shell
Turritella sp.
Turritella vertebroides Morton 1834 turret shell
Turritella vertebroides Morton
"Turritella (Sohlitella) trilira" = Turritella trilira Conrad 1860 turret shell
Turritella (Sohlitella) trilira (C
 Ammonitida - Scaphitidae
Discoscaphites conradi Morton 1834 ammonite
Discoscaphites conradi (Morton) va
 Ammonitida - Baculitidae
"Baculites (Eubaculites) carinatus" = Eubaculites carinatus, Baculites sp.
"Baculites (Eubaculites) carinatus" = Eubaculites carinatus Morton 1834 ammonite
Baculites (Eubaculites) carinatus
Baculites sp. Lamarck 1799 ammonite
Baculites sp.
 Nautilida - Nautilidae
Eutrephoceras dekayi Morton 1834 nautiloid
Eutrephoceras dekayi (Morton)
 Spatangoida - Hemiasteridae
Hemiaster sp. Agassiz and Desor 1847 heart urchin
Hemiaster sp.
Hemiaster wetherbyi de Loriol 1887 heart urchin