MGS #35/#38 Sample 2: 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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20 individuals | |||||||||
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Scaphopoda
- Dentaliida
- Dentaliidae
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Dentalium sp.
Linnaeus 1758
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9 individuals | |||||||||
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Scaphopoda
- Gadilida
- Gadilidae
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Cadulus sp.
Philippi 1844
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74 individuals | |||||||||
| Species A (62 Individuals & Species B together (12 individuals) | ||||||||||
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Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica sp.
Röding 1798
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2 individuals | |||||||||
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Gastropoda
- Heterostropha
- Acteonidae
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Acteon subaldrichi
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4 individuals | |||||||||
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Gastropoda
- Heterostropha
- Ringiculidae
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Ringicula mississippiensis
Conrad 1848
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12 individuals | |||||||||
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Gastropoda
- Opisthobranchia
- Cylichnidae
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Scaphander primus
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2 individuals | |||||||||
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Acteocina crassiplica
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1 individual | |||||||||
| subspecies altispira | ||||||||||
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Gastropoda
- Opisthobranchia
- Haminoeidae
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Atys caseyi
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2 individuals | |||||||||
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Gastropoda
- Turritellidae
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Turritella aff. premimetes
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26 individuals | |||||||||
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Calyptraea cf. aperta
(Solander 1766)
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7 individuals | |||||||||
| recombined as Calyptraea (Trochita) aperta | ||||||||||
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Gastropoda
- Naticidae
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Natica caseyi
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29 individuals | |||||||||
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Gastropoda
- Vitrinellidae
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Vitrinella laevis
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3 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Columbellidae
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Mitrella sp.
Risso 1826
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1 individual | |||||||||
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Gastropoda
- Neogastropoda
- Melongenidae
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Levifusus spiniger
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2 individuals | |||||||||
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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
- Drilliidae
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Syntomodrillia collarubra
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3 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Cochlespiridae
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Tropiscurcula caseyi
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9 individuals | |||||||||
| original and current combination Tropisurcula | ||||||||||
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Gastropoda
- Neogastropoda
- Conidae
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Conus alveatus
Conrad 1865
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1 individual | |||||||||
| synonym of Conus sauridens | ||||||||||
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Gastropoda
- Neogastropoda
- Turridae
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Scobinella caelata
Conrad 1848
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1 individual | |||||||||
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Gemmula amica
Casey 1903
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35 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Borsoniidae
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Bathytoma rhomboidea
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4 individuals | |||||||||
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Microdrillia infans
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5 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Costellariidae
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Vexillum lintoidea
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2 individuals | |||||||||
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Gastropoda
- Eulimidae
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Strombiformis 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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15 individuals | |||||||||
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Bivalvia
- Nuculida
- Nuculidae
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Nucula vicksburgensis
Conrad 1848
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10 individuals | |||||||||
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Bivalvia
- Pectinida
- Dimyidae
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Dimya rufaripa
Vokes 1979
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2 individuals | |||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Chlamys cocoana
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5 individuals | |||||||||
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Eburneopecten subminutus
(Aldrich 1903)
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7 individuals | |||||||||
| recombined as Eburneopecten (Eburneopecten) subminutus | ||||||||||
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Bivalvia
- Ostreida
- Pteriidae
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Pteria argentea
(Conrad 1848)
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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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89 individuals | |||||||||
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Bivalvia
- Cardiida
- Cardiidae
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Nemocardium eocenense
(Meyer 1887)
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6 individuals | |||||||||
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Bivalvia
- Cardiida
- Kelliellidae
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Kelliella rufaripa
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15 individuals | |||||||||
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Bivalvia
- Cardiida
- Veneridae
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Chione victoria
(Dall 1982)
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1 individual | |||||||||
| recombined as Lirophora (Lirophora) victoria | ||||||||||
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Pitar aldrichi
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3 individuals | |||||||||
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Bivalvia
- Pholadida
- Corbulidae
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Corbula rufaripa
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94 individuals | |||||||||
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Corbula engonata
Conrad 1848
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5 individuals | |||||||||
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Bivalvia
- Poromyida
- Spheniopsidae
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Spheniopsis mississippiensis
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1 individual | |||||||||
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Bivalvia
- Poromyida
- Verticordiidae
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Verticordia dalliana
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5 individuals | |||||||||
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Haliris quadrangularis
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3 individuals | |||||||||
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Bivalvia
- Lucinida
- Lucinidae
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Myrtaea scopularis
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12 individuals | |||||||||
| original and current combination Myrtea | ||||||||||
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Lucina varisculpta
Dockery 1982
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1 individual | |||||||||
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Bivalvia
- Carditida
- Carditidae
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Venericardia carsonensis
Dall 1903
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1 individual | |||||||||
| recombined as Venericardia (Rotundicardia) carsonensis | ||||||||||
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Bivalvia
- Carditida
- Astartidae
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Astarte triangulata
Meyer 1886
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48 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 2 15cm 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: | 74078 | ||
| Authorizer: | A. Miller | Enterer: | K. Bulinski |
| Modifier: | J. Sessa | Research group: | GCP,marine invertebrate |
| Created: | 2007-07-20 14:47:59 | Last modified: | 2010-08-10 14:27:01 |
| Access level: | the public | Released: | 2007-07-20 14:47:59 |
| 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] |