Shaqra Group (Arab Fm.): Kimmeridgian, Saudi Arabia
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Nodosariata
- Vaginulinida
- Vaginulinidae
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Lenticulina sp.
Lamarck 1804
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Hottingeritidae
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Alveosepta jaccardi
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Chlorophyceae
- Dasycladales
- Polyphysaceae
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Clypeina sp.
Michelin 1845
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see common names |
Geography
Country: | Saudi Arabia |
Coordinates: | 23.5° North, 47.0° East (view map) |
Paleocoordinates: | 3.4° South, 34.2° East |
Basis of coordinate: | stated in text |
Geographic resolution: | outcrop |
Time
Period: | Jurassic | Epoch: | Late/Upper Jurassic |
Stage: | Kimmeridgian | 10 m.y. bin: | Jurassic 5 |
Key time interval: | Kimmeridgian | ||
Age range of interval: | 157.30000 - 152.10000 m.y. ago |
Stratigraphy
Geological group: | Shaqra | Formation: | Arab | Member: | B |
Local section: | Coupe de al Hatwah | ||||
Local order: | bottom to top |
Lithology and environment
Primary lithology: | lithified "limestone" | ||
Includes fossils? | Y | ||
Lithology description: grain coarsed limestone | |||
Environment: | lagoonal/restricted shallow subtidal | Tectonic setting: | cratonic basin |
Geology comments: The Arab Fm. (and Hith Anhydrite) show a rapid succession of four carbonate-evaporite sequences. Each sequence top is marked by environmental confinement and by the deposition of gypsum and anhydrite. Thes are of an early Kimmeridgian to Tithonian (?) age. The post mortem silting up and encrustation are typical of a protected environment in a very proximal infiltration zone of the shelf. The paleogeography was a very flat-lying and the water very shallow. |
Taphonomy
Size of fossils: | macrofossils,microfossils |
Collection methods and comments
Collection methods: | bulk,mechanical,field collection |
Reason for describing collection: | biostratigraphic analysis |
Metadata
Database number: | 45608 | ||
Authorizer: | F. Fursich | Enterer: | S. Hicks |
Modifier: | S. Hicks | Research group: | marine invertebrate |
Created: | 2004-11-17 04:30:30 | Last modified: | 2005-03-05 05:29:43 |
Access level: | the public | Released: | 2004-11-17 04:30:30 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
11728. | J. Manivit, Y.-M. Le Nindre, and D. Vaslet. 1990. Le Jurassique D`Arabie Centrale. Document du BRGM 4(194):25-519 [F. Fursich/S. Hicks/W. Kiessling] |