MGS #35 Sample 5: Rupelian, Mississippi
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Tritaria falsus
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12 individuals | |||||||||
? Fleurofusia sp.
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3 individuals | |||||||||
Bivalvia
- Nuculida
- Nuculidae
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Nucula vicksburgensis
Conrad 1848
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2 individuals | |||||||||
Bivalvia
- Nuculanida
- Yoldiidae
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Yoldia clydoniona
Dockery 1982
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5 individuals | |||||||||
Bivalvia
- Poromyida
- Spheniopsidae
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Spheniopsis mississippiensis
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5 individuals | |||||||||
Bivalvia
- Poromyida
- Verticordiidae
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Verticordia dalliana
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1 individual | |||||||||
Bivalvia
- Pholadida
- Corbulidae
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Corbula rufaripa
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161 individuals | |||||||||
Bivalvia
- Cardiida
- Cardiidae
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Nemocardium eocenense
(Meyer 1887)
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1 individual | |||||||||
Bivalvia
- Carditida
- Astartidae
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Astarte triangulata
Meyer 1886
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17 individuals | |||||||||
Bivalvia
- Ostreida
- Pteriidae
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Pteria argentea
(Conrad 1848)
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6 individuals | |||||||||
Bivalvia
- Pectinida
- Limidae
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Limaria sp.
Link 1807
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1 individual | |||||||||
Bivalvia
- Pectinida
- Dimyidae
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Dimya rufaripa
Vokes 1979
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12 individuals | |||||||||
Bivalvia
- Pectinida
- Pectinidae
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Pecten sp.
Müller 1776
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1 individual | |||||||||
Eburneopecten subminutus
(Aldrich 1903)
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15 individuals | |||||||||
Bivalvia
- Pectinida
- Spondylidae
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Spondylus dumosus
(Morton 1834)
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5 individuals | |||||||||
Bivalvia
- Arcida
- Limopsidae
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Limopsis sp.
Sassi 1827
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1 individual | |||||||||
Bivalvia
- Arcida
- Glycymerididae
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Glycymeris sp.
Da Costa 1778
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1 individual | |||||||||
Bivalvia
- Arcida
- Arcidae
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Scapharca invidiosa
(Casey 1903)
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30 individuals | |||||||||
Barbatia paradiagona
Dockery 1982
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1 individual | |||||||||
Scaphopoda
- Gadilida
- Gadilidae
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Cadulus sp.
Philippi 1844
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1 individual | |||||||||
sp B | ||||||||||
Scaphopoda
- Dentaliida
- Dentaliidae
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Dentalium sp.
Linnaeus 1758
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6 individuals | |||||||||
Gastropoda
- Opisthobranchiata
- Cylichnidae
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Acteocina crassiplica
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1 individual | |||||||||
subspecies altispira | ||||||||||
Gastropoda
- Naticidae
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Natica caseyi
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12 individuals | |||||||||
Gastropoda
- Neogastropoda
- Drilliidae
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Syntomodrillia collarubra
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2 individuals | |||||||||
Gastropoda
- Neogastropoda
- Turridae
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Pleuroliria subsimilis
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1 individual | |||||||||
Gemmula amica
Casey 1903
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9 individuals | |||||||||
Gastropoda
- Neogastropoda
- Muricidae
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Urosalpinx aspinosus
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4 individuals | |||||||||
Gastropoda
- Neogastropoda
- Mitridae
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Mitra conquista
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1 individual | |||||||||
Gastropoda
- Neogastropoda
- Columbellidae
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Mitrella sp.
Risso 1826
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5 individuals | |||||||||
Gastropoda
- Vitrinellidae
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Vitrinella laevis
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1 individual | |||||||||
Gastropoda
- Tornidae
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Teinostoma sp.
Adams and Adams 1853
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1 individual | |||||||||
Gastropoda
- Turritellidae
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Turritella aff. premimetes
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38 individuals | |||||||||
Gastropoda
- Heterostropha
- Pyramidellidae
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Eulimella clearyensis
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1 individual | |||||||||
Gastropoda
- Heterostropha
- Ringiculidae
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Ringicula mississippiensis
Conrad 1848
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3 individuals | |||||||||
see common names |
Geography
Country: | United States | State/province: | Mississippi | County: | Wayne |
Coordinates: | 31.7° North, 88.7° West (view map) | ||||
Paleocoordinates: | 31.9° North, 82.2° West | ||||
Basis of coordinate: | based on political unit | ||||
Geographic resolution: | outcrop |
Time
Period: | Paleogene | Epoch: | Oligocene |
Stage: | Rupelian | 10 m.y. bin: | Cenozoic 4 |
Key time interval: | Rupelian | ||
Age range of interval: | 33.9 - 27.82 m.y. ago |
Stratigraphy
Geological group: | Vicksburg | Formation: | Red Bluff | ||
Stratigraphic resolution: | formation | ||||
Stratigraphy comments: Sample Level 5 1m above base of red bluff formation.
The basal member of the Vicksburg Group, the Red Bluff formation occurs just above the Yazoo Clay. 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 |
Lithology and environment
Primary lithology: | glauconitic,gray unlithified silty claystone | ||
Secondary lithology: | siltstone | ||
Includes fossils? | Y | ||
Includes fossils? | Y | ||
Lithology description: the contact between the Yazoo clay and the Red Bluff formation "includes lenses of glauconite, bored encrusted pebbles and burrows that pipe the Red Blugg into the underlying Yazoo. Sparsley fossiliferous blue gray clay | |||
Environment: | marine indet. | Tectonic setting: | passive margin |
Geology comments: deeper water following transgressive event |
Taphonomy
Modes of preservation: | body,original aragonite,original calcite |
Size of fossils: | mesofossils |
Collection methods and comments
Collection excludes: | all microfossils,some macrofossils |
Collection methods: | bulk,mechanical,field collection |
Reason for describing collection: | paleoecologic analysis |
Collection method comments: 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. | |
Taxonomic list comments:molluscs only |
Metadata
Database number: | 74081 | ||
Authorizer: | A. Miller | Enterer: | K. Bulinski |
Modifier: | J. Sessa | Research group: | GCP,marine invertebrate |
Created: | 2007-07-20 14:50:02 | Last modified: | 2010-08-10 14:31:46 |
Access level: | the public | Released: | 2007-07-20 14:50:02 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
24875. | 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] |