MGS Loc. 101a - Cleary [Mint Spring Fm]: Rupelian, Mississippi
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Pholadida
- Corbulidae
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Tiza alta
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7 individuals | |||||||||
| R category | ||||||||||
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris arctata
(Conrad 1848)
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1 individual | |||||||||
| R category | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Mississippi | County: | Rankin |
| Coordinates: | 32.2° North, 90.2° West (view map) | ||||
| Paleocoordinates: | 32.5° North, 83.7° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Rupelian | 10 m.y. bin: | Cenozoic 4 |
| *Period: | Early/Lower Tertiary | *Epoch: | Early/Lower Oligocene |
| *International age/stage: | Early/Lower Rupelian - Early/Lower Rupelian | ||
| Key time interval: | Rupelian | ||
| Age range of interval: | 33.9 - 27.82 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Mint Spring | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: The Mint Spring Formation consists of fossiliferous sands that lie disconformably above the estuarine clays and sands of the Forest Hill Formation. The sands of the Mint Spring Formation are moderately clean and often show cross-bedding. These sands indicate a near-shore shelf enviroment and have a macrofauna dominated by bivalves. | |||||
Lithology and environment
| Primary lithology: | lithified conglomeratic,calcareous conglomerate | ||
| Secondary lithology: | wackestone | ||
| Includes fossils? | Y | ||
| Includes fossils? | Y | ||
| Environment: | offshore | Tectonic setting: | passive margin |
Taphonomy
| Modes of preservation: | body,original aragonite,original calcite |
| Size of fossils: | mesofossils |
Collection methods and comments
| Collection excludes: | all microfossils,some macrofossils,difficult macrofossils |
| Collection methods: | bulk,mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: bivalves only. | |
| Taxonomic list comments:the list uses catagories. For example: R = rare, 1-9 valves. C = common, 10- 99 valves. A = abundant, 100+ valves were collected.
Categories are listed in the comments field, absolute abundances are given in the abundance field. Since taxa with greater than 99 specimens were not counted with absolute abundances, these were reported with category "A" for abundant. | |
Metadata
| Database number: | 5945 | ||
| Authorizer: | L. Ivany | Enterer: | S. DeLong |
| Modifier: | A. Hendy | Research group: | GCP,marine invertebrate |
| Created: | 2000-01-03 22:58:57 | Last modified: | 2014-08-21 11:40:06 |
| Access level: | the public | Released: | 2000-01-03 22:58:57 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 323. | D. T. Dockery. 1982. Lower Oligocene Bivalvia of the Vicksburg Group in Mississippi. Mississippi Department of Natural Resources Bureau of Geology 123:1-261 [L. Ivany/S. DeLong/M. Uhen] |