GPSW-7 WELL, Sample 17: Early/Lower Turonian, Egypt
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Dinophyceae
- Gonyaulacales
- Gonyaulacaceae
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Oligosphaeridium cf. complex
Davey and Williams 1966
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1-4 rank | ||||||
| see common names | |||||||
Geography
| Country: | Egypt | State/province: | north Western Desert |
| Coordinates: | 30.0° North, 28.0° East (view map) | ||
| Paleocoordinates: | 11.7° North, 23.2° East | ||
| Basis of coordinate: | estimated from map |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Turonian | 10 m.y. bin: | Cretaceous 6 |
| Key time interval: | Early/Lower Turonian | Pollen zone: | Ephedripites ambiguus-Ephedripites multicostatus-Foveotricolpites giganteus- Foveotricolpites gigantoreticulatus |
| Age range of interval: | 93.90000 - 89.80000 m.y. ago |
Stratigraphy
| Formation: | Abu Roash | Member: | E |
| Local section: | Abu Roash-E | Local bed: | 1719-1722 m |
| Local order: | top to bottom |
Lithology and environment
| Primary lithology: | gray lithified calcareous "limestone" |
| Secondary lithology: | black lithified calcareous "shale" |
| Environment: | shallow subtidal indet. |
| Geology comments: A return to the shallow marine depositional conditions of the previous phase that culminated in the Abu Roash G Member marked the advent of the Turonian Abu Roash E and D Members (GPC, 1994). This is supported palynologically by the onset of a very high terrestrial/fresh-water influx (Fig. 5A, B), based on the presence of brackish/fresh-water algal bodies Botryococcus and Pediastrum deposited in a proximal shelf. | |
Taphonomy
| Modes of preservation: | soft parts,original sporopollenin |
| Size of fossils: | microfossils |
Collection methods and comments
| Collection excludes: | all microfossils |
| Collection methods: | core,chemical |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 140395 | ||
| Authorizer: | C. Jaramillo | Enterer: | G. Doria |
| Modifier: | G. Doria | Research group: | paleobotany |
| Created: | 2013-03-09 05:30:44 | Last modified: | 2013-03-08 12:38:43 |
| Access level: | the public | Released: | 2013-03-09 05:30:44 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 43920. | S. El Beialy, H. S. El Atfy, M. S. Zavada, E. M. El Khoriby, and R. H. Abu-Zied. 2010. Palynological, palynofacies, paleoenvironmental and organic geochemical studies on the Upper Cretaceous succession of the GPTSW-7 well, North Western Desert, Egypt. Marine and Petroleum Geology 27:370-385 [C. Jaramillo/G. Doria/G. Doria] |