ABu-5 (Porters Creek) (Paleocene of the United States)

Where: Butler County, Alabama (31.9° N, 86.9° W: paleocoordinates 34.8° N, 66.9° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Morozovella uncinata and Subbotina trinidadensis foram zone, lower Member (Porters Creek Formation), Danian (66.0 - 61.6 Ma)

• revised age information based on Zullo and Perreault 1991. Local section name: ABu-5

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, brown, gray, calcareous sandstone

• The lower 2 m of the PCF are well exposed and include laminated mudstone and claystone with dispersed glauconite and foraminifera and centimeter-diameter, glauconite-filled, horizontal burrows. The lower part of the PCF is overlain by a 2–3 m interval of discontinuous iron oxide concretions. Above the concretion zone, the upper PCF is massive mudstone in medium to thick beds. (Larsen et al. 2015)
• gray to brown calcareous sand and sandstone

Size class: mesofossils

Primary reference: L. D. Toulmin. 1977. Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region. Geological Survey of Alabama, Monograph 13(1):1-602 [M. Patzkowsky/K. Layou/P. Mannion]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 2855: authorized by Mark Patzkowsky, entered by Karen Layou on 21.07.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• additional taxa of Zullo and Perreault 1991 include some but not all of the forams and ostracodes, with mention of bryozoans and echinoderms
Show authors, comments, and common names
Anthozoa
 Pennatulacea -
Graphularia sp.
Echinoidea
  -
Echinoidea indet.
Echinoidea indet. Leske 1778 sea urchin
"plates"
Asteroidea
  -
Asteroidea indet.
Asteroidea indet. de Blainville 1830 sea star
"ossicles"
Ophiuroidea
  -
Ophiuroidea indet.
Ophiuroidea indet. Gray 1840 brittle star
"ossicles"
Polychaeta
 Sabellida - Serpulidae
Rotularia mcglameryae
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium mediaviense
Bivalvia
 Ostreida - Ostreidae
"Pycnodonte (Phyrgaea) aff. pulaskensis" = Ostrea pulaskensis
"Pycnodonte (Phyrgaea) aff. pulaskensis" = Ostrea pulaskensis Harris 1892 oyster
P. (Phyrgaea)
 Carditida - Carditidae
Venericardia sp.
Venericardia sp. Lamarck 1801 clam
originally entered as "Venericardia spp."
 Pholadida - Teredinidae
Teredo sp.
Teredo sp. Linnaeus 1758 clam
originally entered as "Teredo spp."
Cephalopoda
 Nautilida - Nautilidae
Eutrephoceras sp.
Eutrephoceras sp. Hyatt 1894 nautiloid
 Nautilida - Hercoglossidae
Cimomia subrecta
Cimomia subrecta Miller and Thompson 1933 nautiloid
Gastropoda
 Neogastropoda - Buccinidae
Laevibuccinum constrictum, Pseudoliva sp.
Pseudoliva sp. Swainson 1840 true whelk
Thecostraca
 Scalpellomorpha - Scalpellidae
Arcoscalpellum toulmini n. sp.
Arcoscalpellum toulmini n. sp. Weisbord 1977 barnacle
apparently replaces "Euscalpellum? sp."; species described by Weisbord 1977
Ostracoda
 Platycopida - Cytherellidae
Cytherella sp.
Cytherella sp. Jones 1849 ostracod
 Podocopida - Bairdiidae
Bairdia sp.
Bairdia sp. M'Coy 1844 ostracod
Nodosariata
 Vaginulinida - Vaginulinidae
Lenticulina sp.
Lenticulina sp. Lamarck 1804
 Nodosariida - Nodosariidae
Dentalina sp., Nodosaria sp.
Dentalina sp. d'Orbigny 1826
Nodosaria sp. Lamarck 1812