Shaqra Group (Arab Fm.): Kimmeridgian, Saudi Arabia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Nodosariata - Vaginulinida - Vaginulinidae
Lenticulina sp. Lamarck 1804
Hottingeritidae
Alveosepta jaccardi
Chlorophyceae - Dasycladales - Polyphysaceae
Clypeina sp. Michelin 1845
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]