Braggs-Pine Barren-beds 3-6 (Paleocene of the United States)

Where: Lowndes County, Alabama (32.1° N, 86.8° W: paleocoordinates 34.9° N, 66.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Pine Barren Member (Clayton Formation), Danian (66.0 - 61.6 Ma)

• The Clayton Formation disconformably overlies the Prairie Bluff Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, silty, sandy limestone and poorly lithified, glauconitic, silty, sandy sandstone

• Beds 3-6 Consists of alternating indurated and unconsolidated sandy calcareous silts and limestones. Bed 3 is well cemented micritic lithified limestone. Bed 4 is poorly lithified calcareous glaucanitic silty sand. Bed 5 is lithified limestone w/ recrystallized fossils. Bed 6 is unlithified sandy silt.

•At Braggs there are numerous lithologies including limestones, marls, coarse transgressive lags and glauconitic sands.

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. Collection efforts were focused on the basal Clayton Formation.

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 83261: authorized by Arnold Miller, entered by Jocelyn Sessa on 14.08.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Malacostraca
 Decapoda - Callianassidae
Callianassa sp. Leach 1814 decapod
 Decapoda - Xanthidae
Xanthidae "sp. A" MacLeay 1838 stone crab
Polychaeta
 Sabellida - Serpulidae
Serpula sp. Linnaeus 1758
Serpula ? adnata Wade 1926
 Serpulimorpha -
Hamulus onyx Morton 1834
Gymnolaemata
 Cheilostomata - Onychocellidae
 Cheilostomata - Antroporidae
Stenolaemata
 Cyclostomata - Entalophoridae
Entalophora sp. Lamoureux 1821
 Cyclostomata - Tubuliporidae
 Cyclostomata - Plagioeciidae
? Plagioecia sp. Canu 1918
 Cyclostomata - Cerioporidae
Bivalvia
 Mytilida - Mytilidae
 Ostreida - Gryphaeidae
"Exogyra costata" = Exogyra (Exogyra) costata Say 1820 oyster
Reworked?
Gryphaeostrea vomer Morton 1828 oyster
 Ostreida - Flemingostreidae
"Ostrea tecticosta" = Cubitostrea tecticosta
"Ostrea tecticosta" = Cubitostrea tecticosta Gabb 1860 oyster
 Pectinida - Anomiidae
Anomia argentaria Morton 1833 jingle
Reworked?
Cephalopoda
 Ammonitida - Baculitidae
Baculites sp. Lamarck 1799 ammonite
Reworked?
Echinoidea
 Cidaroida - Cidaridae
Cidaris sp. Leske 1778 pencil urchin