Where: Wayne County, Mississippi (31.7° N, 88.7° W: paleocoordinates 31.9° N, 82.2° W)
• coordinate based on political unit
• outcrop-level geographic resolution
When: Red Bluff Formation (Vicksburg Group), Rupelian (33.9 - 28.1 Ma)
• Sample Level 2 15cm above base of red bluff formation.
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•The basal member of the Vicksburg Group, the Red Bluff formation occurs just above the Yazoo Clay.
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•The contact between the Yazoo clay and the overlying silty glauconitic Red Bluff formation is abrupt and contains the features of a typical disconformable transgressive contact
• formation-level stratigraphic resolution
Environment/lithology: marine; unlithified, glauconitic, gray, silty claystone and siltstone
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•Sparsley fossiliferous blue gray clay
Size class: mesofossils
Preservation: original aragonite, original calcite
Collection methods: bulk, mechanical,
• molluscs only---Samples were dried and washed through 1.00m sieves. Wet sieved with minimal breakage. Random subsamples of the washed shell material were taken and completely picked for all identifiable shells including bivalve beaks and gastropod apices. All bivalve beaks were counted and then divided by two. Each gastropod apex was counted as one individual.
Primary reference: T. A. Hansen, P.H. Kelley, and D.M. Haasl. 2004. Paleoecological patterns in molluscan extinctions and recoveries: comparison of the Cretaceous-Paleogene and Eocene-Oligocene extinctions in North America. Palaeogeography, Palaeoclimatology, Palaeoecology 214:233-242 [A. Miller/K. Bulinski]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 74078: authorized by Arnold Miller, entered by Kate Bulinski on 20.07.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Scaphopoda | |
Cadulus sp. Philippi 1844 tusk shell Species A (62 Individuals & Species B together (12 individuals)
| |
Dentalium sp. Linnaeus 1758 tusk shell | |
Gastropoda | |
Strombiformis caseyi snail | |
"Calyptraea cf. aperta" = Calyptraea (Trochita) aperta
"Calyptraea cf. aperta" = Calyptraea (Trochita) aperta Solander 1766 slipper shell | |
Turritella aff. premimetes turret shell | |
Natica caseyi moon snail | |
Vexillum lintoidea ribbed mitre | |
Mitra conquista mitre shell | |
Levifusus spiniger snail | |
Mitrella sp. Risso 1826 snail | |
"Conus alveatus" = Conus sauridens
"Conus alveatus" = Conus sauridens Conrad 1833 cone shell | |
"Tropiscurcula caseyi" = Tropisurcula
"Tropiscurcula caseyi" = Tropisurcula snail | |
Scobinella caelata Conrad 1848 turrid
Gemmula amica Casey 1903 turrid | |
Microdrillia infans snail
Bathytoma rhomboidea snail | |
Vitrinella laevis snail | |
Architectonica sp. Röding 1798 sundial | |
Acteon subaldrichi snail | |
Ringicula mississippiensis Conrad 1848 snail | |
Scaphander primus snail | |
Atys caseyi snail | |
Bivalvia | |
Yoldia clydoniona Dockery 1982 clam | |
Nucula vicksburgensis Conrad 1848 nut clam | |
Verticordia dalliana clam | |
Corbula rufaripa clam
Corbula engonata Conrad 1848 clam | |
Kelliella rufaripa clam | |
Pitar aldrichi, "Chione victoria" = Lirophora (Lirophora) victoria
Pitar aldrichi venus clam
"Chione victoria" = Lirophora (Lirophora) victoria Dall 1982 venus clam | |
Nemocardium eocenense Meyer 1887 cockle | |
"Myrtaea scopularis" = Myrtea, Lucina varisculpta
"Myrtaea scopularis" = Myrtea clam
Lucina varisculpta Dockery 1982 clam | |
"Venericardia carsonensis" = Venericardia (Rotundicardia) carsonensis
"Venericardia carsonensis" = Venericardia (Rotundicardia) carsonensis Dall 1903 clam | |
Astarte triangulata Meyer 1886 clam | |
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus, Chlamys cocoana
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus Aldrich 1903 scallop
Chlamys cocoana scallop | |
Dimya rufaripa Vokes 1979 scallop | |
Pteria argentea Conrad 1848 pearl oyster | |
Scapharca invidiosa Casey 1903 clam |