MGS #35/#38 Sample 3: Rupelian, Mississippi
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Tritaria falsus
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30 individuals | |||||||||
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Scaphopoda
- Gadilida
- Gadilidae
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Cadulus sp.
Philippi 1844
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113 individuals | |||||||||
| Species A (106 Individuals & Species B together (7 individuals) | ||||||||||
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Scaphopoda
- Dentaliida
- Dentaliidae
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Dentalium sp.
Linnaeus 1758
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19 individuals | |||||||||
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Gastropoda
- Eulimidae
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Strombiformis caseyi
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1 individual | |||||||||
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Calyptraea cf. aperta
(Solander 1766)
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1 individual | |||||||||
| recombined as Calyptraea (Trochita) aperta | ||||||||||
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Gastropoda
- Turritellidae
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Turritella aff. premimetes
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22 individuals | |||||||||
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Gastropoda
- Naticidae
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Natica caseyi
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46 individuals | |||||||||
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Gastropoda
- Ranellidae
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? Sassia sp.
(Bellardi 1872)
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1 individual | |||||||||
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Gastropoda
- Neogastropoda
- Costellariidae
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Vexillum lintoidea
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2 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Cancellariidae
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Agatrix mississippiensis
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2 individuals | |||||||||
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Olssonella elongata
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1 individual | |||||||||
| replaced by Axelella | ||||||||||
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Gastropoda
- Neogastropoda
- Mitridae
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Mitra conquista
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1 individual | |||||||||
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Gastropoda
- Neogastropoda
- Columbellidae
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Mitrella sp.
Risso 1826
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2 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Conidae
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Conus alveatus
Conrad 1865
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3 individuals | |||||||||
| synonym of Conus sauridens | ||||||||||
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Gastropoda
- Neogastropoda
- Cochlespiridae
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Tropiscurcula caseyi
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4 individuals | |||||||||
| original and current combination Tropisurcula | ||||||||||
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Gastropoda
- Neogastropoda
- Turridae
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Gemmula amica
Casey 1903
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39 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Drilliidae
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Syntomodrillia collarubra
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7 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Borsoniidae
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Microdrillia infans
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3 individuals | |||||||||
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Gastropoda
- Tornidae
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Teinostoma caseyi
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1 individual | |||||||||
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Gastropoda
- Heterostropha
- Mathildidae
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Mathilda regularis
(Meyer 1886)
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1 individual | |||||||||
| original and current combination Eglisia regularis | ||||||||||
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Gastropoda
- Heterostropha
- Pyramidellidae
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Eulimella clearyensis
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4 individuals | |||||||||
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Odostomia sp.
Fleming 1817
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1 individual | |||||||||
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Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica sp.
Röding 1798
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1 individual | |||||||||
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Gastropoda
- Heterostropha
- Ringiculidae
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Ringicula mississippiensis
Conrad 1848
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14 individuals | |||||||||
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Gastropoda
- Opisthobranchia
- Retusidae
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Volvulella subspinosa
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3 individuals | |||||||||
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Gastropoda
- Opisthobranchia
- Cylichnidae
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Acteocina crassiplica
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6 individuals | |||||||||
| subspecies altispira | ||||||||||
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Scaphander primus
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1 individual | |||||||||
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Gastropoda
- Opisthobranchia
- Haminoeidae
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Atys caseyi
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1 individual | |||||||||
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Bivalvia
- Nuculanida
- Yoldiidae
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Yoldia clydoniona
Dockery 1982
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38 individuals | |||||||||
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Bivalvia
- Nuculida
- Nuculidae
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Nucula vicksburgensis
Conrad 1848
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16 individuals | |||||||||
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Bivalvia
- Poromyida
- Verticordiidae
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Verticordia dalliana
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4 individuals | |||||||||
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Haliris quadrangularis
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1 individual | |||||||||
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Bivalvia
- Poromyida
- Spheniopsidae
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Spheniopsis mississippiensis
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1 individual | |||||||||
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Bivalvia
- Pholadida
- Corbulidae
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Corbula rufaripa
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68 individuals | |||||||||
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Corbula engonata
Conrad 1848
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2 individuals | |||||||||
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Bivalvia
- Cardiida
- Kelliellidae
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Kelliella rufaripa
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6 individuals | |||||||||
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Bivalvia
- Cardiida
- Veneridae
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Pitar aldrichi
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1 individual | |||||||||
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Chione victoria
(Dall 1982)
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1 individual | |||||||||
| recombined as Lirophora (Lirophora) victoria | ||||||||||
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Bivalvia
- Cardiida
- Cardiidae
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Nemocardium eocenense
(Meyer 1887)
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5 individuals | |||||||||
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Bivalvia
- Lucinida
- Lucinidae
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Myrtaea scopularis
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141 individuals | |||||||||
| original and current combination Myrtea | ||||||||||
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Bivalvia
- Carditida
- Astartidae
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Astarte triangulata
Meyer 1886
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39 individuals | |||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Eburneopecten subminutus
(Aldrich 1903)
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2 individuals | |||||||||
| recombined as Eburneopecten (Eburneopecten) subminutus | ||||||||||
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Chlamys cocoana
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2 individuals | |||||||||
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Bivalvia
- Arcida
- Arcidae
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Scapharca invidiosa
(Casey 1903)
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45 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: | 33.90000 - 27.82000 m.y. ago |
Stratigraphy
| Geological group: | Vicksburg | Formation: | Red Bluff | ||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: Sample Level 3 30cm 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: | 74079 | ||
| Authorizer: | A. Miller | Enterer: | K. Bulinski |
| Modifier: | J. Sessa | Research group: | GCP,marine invertebrate |
| Created: | 2007-07-20 14:48:38 | Last modified: | 2010-08-10 14:27:29 |
| Access level: | the public | Released: | 2007-07-20 14:48:38 |
| 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] |