Thmed Al Qusur Member, Wadi Thamat Formation: Priabonian, Libya
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Echinoidea
- Cidaroida
- Cidaridae
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Cidaris sp.
Leske 1778
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Gastropoda
- Strombidae
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? Strombus sp.
Linnaeus 1758
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Rostellaria mokattamensis
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| synonym of Tibia | |||||||
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Gastropoda
- Cypraeidae
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? Gisortia sp.
Jousseaume 1884
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Bivalvia
- Ostreida
- Arctostreidae
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Ostrea sp.
Linnaeus 1758
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| see common names | |||||||
Geography
| Country: | Libya |
| Coordinates: | 29.7° North, 17.7° East (view map) |
| Paleocoordinates: | 25.6° North, 14.2° East |
| Basis of coordinate: | stated in text |
| Geographic resolution: | basin |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Priabonian | 10 m.y. bin: | Cenozoic 3 |
| Key time interval: | Priabonian | ||
| Age range of interval: | 37.71000 - 33.90000 m.y. ago |
Stratigraphy
| Formation: | Wadi Thamat | Member: | Thmed Al Qusur | ||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: LITHOSTRATIGRAPHIC RELATIONSHIPS: From the Thmed Al Qusur Mbr of the Wadi Thamat Fm, which overlies the Al Gata (Lutetian) and is overlain by the Qararat Al Jifah Mbr of the Wadi Thamat Fm (Priabonian). AGE: Priabonian, on the basis of macrofossil biostratigraphy. THICKNESS: varies from 35-40 m across its range. | |||||
Lithology and environment
| Primary lithology: | brown,white,yellow lithified cherty/siliceous "limestone" |
| Includes fossils? | Y |
| Lithology description: GENERAL LITHOLOGY: White to cream-colored nonbedded massive chalk and chalky limestone, with unevenly distributed irregular flint and chert of brown color. LITHIFICATION: Lithified, not stated, but apparent from facies description. | |
| Environment: | lagoonal/restricted shallow subtidal |
| Geology comments: ENVIRONMENT: Littoral zone, restricted circulation, lagoonal environment.
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Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,microfossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: COLLECTORS: Not stated, possibly multiple collectors. REPOSITORY: Unknown.
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| Taxonomic list comments:COVERAGE: Limited, but including bivalvia, gastropoda, echinoids, algae, and foraminifera. NOMENCLATURE: Somewhat antiquated nomenclature, but identified to species and subgenus resolution. | |
Metadata
| Database number: | 77236 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2008-01-06 21:19:13 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2008-01-06 21:19:13 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 26106. | M. F. Megerisi and V. D. Mamgain. 1980. The Upper Cretaceous-Tertiary Formations of northern Libya: a synthesis. Department of Geological Researches and Mining Bulletin 12:1-85 [A. Hendy/A. Hendy] |