MGS #35 Sample 4: 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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22 individuals | |||||||||
Bivalvia
- Nuculida
- Nuculidae
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Nucula vicksburgensis
Conrad 1848
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5 individuals | |||||||||
Bivalvia
- Nuculanida
- Yoldiidae
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Yoldia clydoniona
Dockery 1982
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23 individuals | |||||||||
Bivalvia
- Poromyida
- Spheniopsidae
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Spheniopsis mississippiensis
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1 individual | |||||||||
Bivalvia
- Poromyida
- Verticordiidae
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Verticordia dalliana
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3 individuals | |||||||||
Haliris quadrangularis
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2 individuals | |||||||||
Bivalvia
- Pholadida
- Corbulidae
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Corbula rufaripa
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26 individuals | |||||||||
Corbula engonata
Conrad 1848
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1 individual | |||||||||
Bivalvia
- Cardiida
- Kelliellidae
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Kelliella rufaripa
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2 individuals | |||||||||
Bivalvia
- Cardiida
- Veneridae
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Pitar aldrichi
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1 individual | |||||||||
Bivalvia
- Cardiida
- Cardiidae
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Nemocardium eocenense
(Meyer 1887)
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1 individual | |||||||||
Bivalvia
- Lucinida
- Lucinidae
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Myrtaea scopularis
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17 individuals | |||||||||
Bivalvia
- Carditida
- Astartidae
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Astarte triangulata
Meyer 1886
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19 individuals | |||||||||
Bivalvia
- Pectinida
- Pectinidae
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Pecten sp.
Müller 1776
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1 individual | |||||||||
Chlamys cocoana
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2 individuals | |||||||||
Eburneopecten subminutus
(Aldrich 1903)
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3 individuals | |||||||||
Bivalvia
- Arcida
- Arcidae
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Scapharca invidiosa
(Casey 1903)
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19 individuals | |||||||||
Scaphopoda
- Gadilida
- Gadilidae
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Cadulus sp.
Philippi 1844
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50 individuals | |||||||||
Species A (45 Individuals & Species B together (5 individuals) | ||||||||||
Scaphopoda
- Dentaliida
- Dentaliidae
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Dentalium sp.
Linnaeus 1758
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15 individuals | |||||||||
Gastropoda
- Opisthobranchiata
- Haminoeidae
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Atys caseyi
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2 individuals | |||||||||
Gastropoda
- Opisthobranchiata
- Cylichnidae
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Acteocina crassiplica
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6 individuals | |||||||||
subspecies altispira | ||||||||||
Scaphander primus
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2 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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14 individuals | |||||||||
Gastropoda
- Neogastropoda
- Conidae
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Conus protractus
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1 individual | |||||||||
Gastropoda
- Neogastropoda
- Drilliidae
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Syntomodrillia collarubra
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5 individuals | |||||||||
Gastropoda
- Neogastropoda
- Turridae
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Gemmula amica
Casey 1903
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6 individuals | |||||||||
Gastropoda
- Neogastropoda
- Cancellariidae
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Olssonella elongata
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1 individual | |||||||||
Gastropoda
- Vitrinellidae
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Vitrinella laevis
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1 individual | |||||||||
Gastropoda
- Turritellidae
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Turritella aff. premimetes
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12 individuals | |||||||||
Gastropoda
- Heterostropha
- Pyramidellidae
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Eulimella clearyensis
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1 individual | |||||||||
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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8 individuals | |||||||||
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: | 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 4 45cm 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: | 74080 | ||
Authorizer: | A. Miller | Enterer: | K. Bulinski |
Modifier: | J. Sessa | Research group: | GCP,marine invertebrate |
Created: | 2007-07-20 14:49:18 | Last modified: | 2010-08-10 14:28:08 |
Access level: | the public | Released: | 2007-07-20 14:49:18 |
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] |