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 3 30cm 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 74079: 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 (106 Individuals & Species B together (7 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 | |
? Sassia sp. Bellardi 1872 triton shell | |
Vexillum lintoidea ribbed mitre | |
Agatrix mississippiensis, "Olssonella elongata" = Axelella
Agatrix mississippiensis nutmeg
"Olssonella elongata" = Axelella snail | |
Mitra conquista mitre shell | |
Mitrella sp. Risso 1826 snail | |
"Conus alveatus" = Conus sauridens
"Conus alveatus" = Conus sauridens Conrad 1833 cone shell | |
"Tropiscurcula caseyi" = Tropisurcula
"Tropiscurcula caseyi" = Tropisurcula snail | |
Gemmula amica Casey 1903 turrid | |
Microdrillia infans snail | |
Teinostoma caseyi snail | |
Mathilda regularis Meyer 1886 snail | |
Eulimella clearyensis snail
Odostomia sp. Fleming 1817 snail | |
Architectonica sp. Röding 1798 sundial | |
Ringicula mississippiensis Conrad 1848 snail | |
Volvulella subspinosa 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
"Myrtaea scopularis" = Myrtea clam | |
Astarte triangulata Meyer 1886 clam | |
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus, Chlamys cocoana
"Eburneopecten subminutus" = Eburneopecten (Eburneopecten) subminutus Aldrich 1903 scallop
Chlamys cocoana scallop | |
Scapharca invidiosa Casey 1903 clam |