Braggs-Middle Prairie Bluff (Cretaceous of the United States)

Where: Lowndes County, Alabama (32.1° N, 86.8° W: paleocoordinates 35.3° N, 64.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Prairie Bluff Formation (Selma Group), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• At Braggs the Prairie Bluff Formation unconformably overlies the fossiliferous Ripley Formateion. The Clayton Formation disconformably overlies the Prairie Bluff Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; unlithified, silty, sandy limestone

• An impure silty to sandy chalk with subordinate amounts of clay, sand and chalky limestone is approximately 30m thick.

Size class: mesofossils

Collection methods: bulk, surface (in situ),

• Some areas were sampled on the outcrop surface, others were excavated with pick and shovel and some more specimens came from screenwashing bulk sediments.

Primary reference: J. R. Bryan and D. S. Jones. 1989. Fabric of the Cretaceous-Tertiary Marine Macrofaunal Transition at Braggs, Alabama. Palaeogeography, Palaeoclimatology, Palaeoecology 69:279-301 [A. Miller/J. Sessa]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 83237: authorized by Arnold Miller, entered by Jocelyn Sessa on 12.08.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• Faunal lists were supplemented by a US Geological Survey Open File Report (Sohl and Koch 1983). Most of the species listed from Ripley, Lower and Middle Prairie Bluff were taken from the Open File Report.
unclassified
  -
Gastropoda
 Seguenzioidea - Eucyclidae
Calliomphalus sp. Cossmann 1888 snail
Calliomphalus Planolateralis sp.
 Euomphalina - Euomphalidae
 Cerithioidea - Turritellidae
Laxispira monilifera Sohl 1964 turret shell
Turritella hilgardi turret shell
Turritella ? trilira Conrad 1860 turret shell
Haustator bilira Stephenson 1941 turret shell
 Neogastropoda - Fasciolariidae
? Bellifusus sp. Stephenson 1941 snail
Hercorhyncus sp. Conrad 1868 snail
Hercorhyncus Haplovoluta sp.
 Neogastropoda - Turbinellidae
Napulus sp. Stephenson 1941 snail
 Neogastropoda - Paladmetidae
Paladmete cancellaria Conrad 1858 snail
 Sorbeoconcha - Naticidae
Amaurellina sp. Fischer 1885 moon snail
Euspira rectilabrum Conrad 1858 moon snail
Gyrodes sp. Conrad 1860 moon snail
 Heterostropha - Acteonidae
Acteon sp. Montfort 1810 snail
Bivalvia
 Arcida - Parallelodontidae
 Arcida - Arcidae
Arca sp. Linnaeus 1758 ark
 Myalinida - Inoceramidae
Inoceramus "sp B" Sowerby 1814 clam
Inoceramus Inoceramus sp.
 Pectinida - Anomiidae
Anomia ornata Gabb 1876 jingle
Anomia argentaria Morton 1833 jingle
Anomia Anomia argenteria
 Pectinida - Pectinoidae
Camptonectes bubonis Stephenson 1941 scallop
Camptonectes Camptonectes bubonis
 Ostreida - Malleidae
 Ostreida - Gryphaeidae
Gryphaeostrea vomer Morton 1828 oyster
"Exogyra costata" = Exogyra (Exogyra) costata Say 1820 oyster
 Ostreida - Ostreidae
 Mytilida - Crenellidae
 Mytilida - Mytilidae
Lithophaga sp. Röding 1798 mussel
 Poromyida - Cuspidariidae
Cuspidaria sp. Dall 1886 clam
 Poromyida - Poromyidae
Liopistha protexta Conrad 1853 clam
 Pholadomyida - Pholadomyidae
 Pholadida - Corbulidae
"Caesticorbula crassaplica" = Caestocorbula crassiplica, Corbula monmouthensis
"Caesticorbula crassaplica" = Caestocorbula crassiplica Gabb 1860 clam
Caesticorbula Caesticorbula crassaplica
Corbula monmouthensis Gardner 1916 clam
 Cardiida - Arcticidae
Veniella conradi Morton 1833 clam
 Cardiida - Mactridae
 Cardiida - Cardiidae
Granocardium lowei cockle
Granocardium Granocardium lowei
Protocardia sp. Beyrich 1845 cockle
Protocardia ? Brevicardium sp.
 Cardiida - Tellinidae
"Linearia metastriata" = Linearis, Aenona eufalensis
"Linearia metastriata" = Linearis tellin clam
Aenona eufalensis tellin clam
 Hiatellida - Hiatellidae
Panopea sp. Menard 1807 clam
 Carditida - Carditidae
 Carditida - Crassatellidae
Crassatella vadosa Morton 1834 clam
 Trigoniida - Megatrigonioidae
 Nuculida - Nuculidae
Nucula sp. Lamarck 1799 nut clam
Polychaeta
 Serpulimorpha -
Hamulus onyx Morton 1834