MGS #35 Sample 7: 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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25 individuals | |||||||||
Bivalvia
- Nuculida
- Nuculidae
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Nucula vicksburgensis
Conrad 1848
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16 individuals | |||||||||
Brevinucula pseudopunctata
Dockery 1982
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5 individuals | |||||||||
Bivalvia
- Nuculanida
- Yoldiidae
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Yoldia clydoniona
Dockery 1982
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12 individuals | |||||||||
Bivalvia
- Poromyida
- Verticordiidae
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Verticordia dalliana
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4 individuals | |||||||||
Bivalvia
- Pholadida
- Corbulidae
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Corbula rufaripa
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517 individuals | |||||||||
Corbula engonata
Conrad 1848
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1 individual | |||||||||
Bivalvia
- Cardiida
- Kelliellidae
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Kelliella rufaripa
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19 individuals | |||||||||
Bivalvia
- Cardiida
- Chamidae
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Chama sp.
Linnaeus 1758
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1 individual | |||||||||
Bivalvia
- Cardiida
- Veneridae
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Pitar aldrichi
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5 individuals | |||||||||
Chione victoria
(Dall 1982)
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1 individual | |||||||||
Bivalvia
- Cardiida
- Semelidae
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Ervilia exterolaevis
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2 individuals | |||||||||
Bivalvia
- Cardiida
- Cardiidae
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Nemocardium eocenense
(Meyer 1887)
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4 individuals | |||||||||
Bivalvia
- Lucinida
- Lucinidae
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Myrtaea scopularis
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10 individuals | |||||||||
Bivalvia
- Carditida
- Carditidae
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Venericardia carsonensis
Dall 1903
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2 individuals | |||||||||
Bivalvia
- Carditida
- Astartidae
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Astarte triangulata
Meyer 1886
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42 individuals | |||||||||
Bivalvia
- Carditida
- Crassatellidae
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Crassinella variablis
Dockery 1982
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2 individuals | |||||||||
Bivalvia
- Pectinida
- Pectinidae
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Pecten perplanus
Morton 1833
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1 individual | |||||||||
Eburneopecten subminutus
(Aldrich 1903)
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41 individuals | |||||||||
Bivalvia
- Arcida
- Arcidae
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Scapharca invidiosa
(Casey 1903)
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62 individuals | |||||||||
Scaphopoda
- Gadilida
- Gadilidae
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Cadulus sp.
Philippi 1844
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28 individuals | |||||||||
sp. B | ||||||||||
Scaphopoda
- Dentaliida
- Dentaliidae
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Dentalium sp.
Linnaeus 1758
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5 individuals | |||||||||
Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Calyptraea cf. aperta
(Solander 1766)
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1 individual | |||||||||
Gastropoda
- Naticidae
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Natica caseyi
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39 individuals | |||||||||
Gastropoda
- Neogastropoda
- Drilliidae
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Syntomodrillia collarubra
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2 individuals | |||||||||
Gastropoda
- Neogastropoda
- Borsoniidae
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Microdrillia infans
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3 individuals | |||||||||
Gastropoda
- Neogastropoda
- Turridae
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Gemmula amica
Casey 1903
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12 individuals | |||||||||
Gastropoda
- Neogastropoda
- Volutidae
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Caricella reticulata
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2 individuals | |||||||||
Gastropoda
- Neogastropoda
- Muricidae
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Urosalpinx aspinosus
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2 individuals | |||||||||
Gastropoda
- Neogastropoda
- Mitridae
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Mitra conquista
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6 individuals | |||||||||
Gastropoda
- Neogastropoda
- Columbellidae
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Mitrella sp.
Risso 1826
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1 individual | |||||||||
Gastropoda
- Triforidae
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Cerithiella langdoni
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1 individual | |||||||||
Gastropoda
- Tornidae
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Teinostoma caseyi
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1 individual | |||||||||
Gastropoda
- Eulimidae
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Strombiformis caseyi
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2 individuals | |||||||||
Gastropoda
- Turritellidae
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Turritella aff. premimetes
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47 individuals | |||||||||
Gastropoda
- Heterostropha
- Pyramidellidae
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Eulimella clearyensis
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4 individuals | |||||||||
Gastropoda
- Heterostropha
- Acteonidae
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Acteon subaldrichi
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1 individual | |||||||||
Gastropoda
- Heterostropha
- Ringiculidae
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Ringicula mississippiensis
Conrad 1848
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4 individuals | |||||||||
Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica hargeri
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1 individual | |||||||||
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 7 3.5m 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: | 74083 | ||
Authorizer: | A. Miller | Enterer: | K. Bulinski |
Modifier: | J. Sessa | Research group: | GCP,marine invertebrate |
Created: | 2007-07-20 14:52:36 | Last modified: | 2010-08-10 14:32:47 |
Access level: | the public | Released: | 2007-07-20 14:52:36 |
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] |