Dur at Tallhah (Evaporite unit): Late/Upper Eocene, Libya
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Ostreida
- Arctostreidae
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Ostrea cubitus
Deshayes 1832
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Ostrea clotbeyi
Bellardi 1854
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| recombined as Alectryonia clotbeyi | |||||||
| see common names | |||||||
Geography
| Country: | Libya |
| Coordinates: | 24.0° North, 17.0° East (view map) |
| Paleocoordinates: | 19.9° North, 13.1° East |
| Basis of coordinate: | stated in text |
| Geographic resolution: | local area |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Priabonian | 10 m.y. bin: | Cenozoic 3 |
| Key time interval: | Late/Upper Eocene | ||
| Age range of interval: | 37.71000 - 33.90000 m.y. ago |
Stratigraphy
| Member: | Evaporite | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Paleogene section is 100 ft (30 m) thick and similar and correlatable to the Eocene-Oligocene Qasr el Sagha and Gebel Qatrani Formations of Fayium, Egypt. These sediments (no formation name) are subdivided into three units from bottom to top: the Evaporite Unit, the Idam Unit, and the Sadr Unit. The Evaporite Unit contains upper Eocene oyster beds with Ostrea clotbeyi and Ostrea cubitus at the base and grades laterally into chert and dolomitic limestones and upwards into limestones and marls with gypsym. The unit directly overlies the Precambrian basement and is overlain by the lower Oligocene Idam Unit. | |||||
Lithology and environment
| Primary lithology: | gypsiferous,shelly/skeletal lithified cherty/siliceous "limestone" |
| Secondary lithology: | dolomitic,gypsiferous claystone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: Oyster beds at the base and grades laterally into chert and dolomitic limestones and upwards into limestones and marls with gypsym. | |
| Environment: | reef, buildup or bioherm |
| Geology comments: No paleoenvironmental data provided. Collection fomr an "oyster reef". | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | general faunal/floral analysis |
| Collection method comments: No detailed collection data reported. | |
| Taxonomic list comments:Collection based on taxa listed in text as typical of formation. Include only mollusca. Page 273. | |
Metadata
| Database number: | 42137 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2004-07-24 15:13:16 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2004-07-24 15:13:16 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 11199. | E. E. Tawadros. 2001. Geology of Egypt and Libya 1-468 [A. Miller/A. Hendy/M. Clapham] |