MGS #35/#38 Sample 1: 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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33 individuals | |||||||||
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Bivalvia
- Nuculida
- Nuculidae
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Nucula vicksburgensis
Conrad 1848
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17 individuals | |||||||||
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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
- Poromyida
- Spheniopsidae
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Spheniopsis mississippiensis
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1 individual | |||||||||
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Bivalvia
- Poromyida
- Cuspidariidae
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Plectodon intastriata
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5 individuals | |||||||||
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Bivalvia
- Poromyida
- Verticordiidae
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Verticordia dalliana
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6 individuals | |||||||||
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Haliris quadrangularis
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3 individuals | |||||||||
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Bivalvia
- Pholadida
- Teredinidae
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? Teredo sp.
Linnaeus 1758
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1 individual | |||||||||
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Bivalvia
- Pholadida
- Corbulidae
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Corbula rufaripa
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162 individuals | |||||||||
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Corbula engonata
Conrad 1848
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10 individuals | |||||||||
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Bivalvia
- Cardiida
- Kelliellidae
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Kelliella rufaripa
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16 individuals | |||||||||
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Bivalvia
- Cardiida
- Cardiidae
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Nemocardium eocenense
(Meyer 1887)
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3 individuals | |||||||||
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Bivalvia
- Lucinida
- Lucinidae
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Myrtaea scopularis
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11 individuals | |||||||||
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Bivalvia
- Carditida
- Carditidae
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Venericardia carsonensis
Dall 1903
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2 individuals | |||||||||
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Bivalvia
- Carditida
- Astartidae
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Astarte triangulata
Meyer 1886
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145 individuals | |||||||||
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Bivalvia
- Ostreida
- Pteriidae
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Pteria argentea
(Conrad 1848)
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4 individuals | |||||||||
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Bivalvia
- Pectinida
- Dimyidae
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Dimya rufaripa
Vokes 1979
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1 individual | |||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Pecten sp.
Müller 1776
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2 individuals | |||||||||
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Chlamys cocoana
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14 individuals | |||||||||
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Eburneopecten subminutus
(Aldrich 1903)
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12 individuals | |||||||||
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Bivalvia
- Arcida
- Arcidae
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Scapharca invidiosa
(Casey 1903)
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275 individuals | |||||||||
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Scaphopoda
- Gadilida
- Gadilidae
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Cadulus sp.
Philippi 1844
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154 individuals | |||||||||
| Species A (140 Individuals & Species B together (14 individuals) | ||||||||||
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Scaphopoda
- Dentaliida
- Dentaliidae
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Dentalium sp.
Linnaeus 1758
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12 individuals | |||||||||
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Gastropoda
- Opisthobranchiata
- Retusidae
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Volvulella subspinosa
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1 individual | |||||||||
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Gastropoda
- Opisthobranchiata
- Cylichnidae
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Acteocina crassiplica
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1 individual | |||||||||
| subspecies altispira | ||||||||||
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Calyptraea cf. aperta
(Solander 1766)
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1 individual | |||||||||
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Gastropoda
- Naticidae
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Natica caseyi
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72 individuals | |||||||||
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Gastropoda
- Cassidae
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Sconsia sp.
Gray 1847
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2 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Terebridae
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Terebra hiwanneensis
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1 individual | |||||||||
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Gastropoda
- Neogastropoda
- Drilliidae
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Syntomodrillia collarubra
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8 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Borsoniidae
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Microdrillia infans
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5 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Turridae
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Pleuroliria subsimilis
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1 individual | |||||||||
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Gemmula amica
Casey 1903
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64 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Cochlespiridae
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Tropiscurcula caseyi
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12 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Cancellariidae
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Olssonella elongata
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1 individual | |||||||||
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Gastropoda
- Neogastropoda
- Costellariidae
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Vexillum lintoidea
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7 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Mitridae
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Mitra conquista
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6 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Melongenidae
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Levifusus spiniger
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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
- Vitrinellidae
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Vitrinella laevis
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1 individual | |||||||||
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Gastropoda
- Eulimidae
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Strombiformis caseyi
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4 individuals | |||||||||
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Gastropoda
- Epitoniidae
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Scalina rubricollis
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1 individual | |||||||||
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Gastropoda
- Turritellidae
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Turritella aff. premimetes
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65 individuals | |||||||||
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Gastropoda
- Heterostropha
- Mathildidae
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Mathilda regularis
(Meyer 1886)
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1 individual | |||||||||
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Gastropoda
- Heterostropha
- Pyramidellidae
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Eulimella clearyensis
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1 individual | |||||||||
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Turbonilla mississippiensis
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2 individuals | |||||||||
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Gastropoda
- Heterostropha
- Ringiculidae
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Ringicula mississippiensis
Conrad 1848
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15 individuals | |||||||||
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Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica textilina
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1 individual | |||||||||
| subspecies caseyi | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Mississippi | County: | Wayne |
| Coordinates: | 31.7° North, 88.7° West (view map) | ||||
| Paleocoordinates: | 35.3° North, 75.6° West (Wright 2013) | ||||
| 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 1 0-5cm 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: | 74077 | ||
| Authorizer: | A. Miller | Enterer: | K. Bulinski |
| Modifier: | J. Sessa | Research group: | GCP,marine invertebrate |
| Created: | 2007-07-20 14:41:41 | Last modified: | 2010-08-10 14:23:57 |
| Access level: | the public | Released: | 2007-07-20 14:41:41 |
| 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] |