Shaqra Group (Dhruma Fm.): Bajocian, Saudi Arabia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Stephanoceratidae
Ermoceras coronatoides (Douvillé 1916)
Gastropoda - Pleurotomariidae
Pleurotomaria sp. Defrance 1826
Gastropoda - Naticidae
Natica sp. Scopoli 1777
Bivalvia - Ostreida - Palaeolophidae
Lopha gregarea (Sowerby 1816)
recombined as Actinostreon gregareum
Bivalvia - Pholadomyida - Pholadomyidae
Homomya cf. gibbosa Sowerby 1814
Rhynchonellata - Terebratulida - Lissajousithyrididae
Monsardithyris ventricosa (Hartmann 1830)
Rhynchonellata - Terebratulida - Lobothyrididae
Tubithyris chouberti Rousselle 1965
Echinoidea - Nucleolitidae
Nucleolites sp. Lamarck 1801
=n.sp.1
see common names

Geography
Country:Saudi Arabia
Coordinates: 23.1° North, 46.3° East (view map)
Paleocoordinates:2.9° South, 33.4° East
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Jurassic Epoch:Middle Jurassic
Stage:Bajocian 10 m.y. bin:Jurassic 4
Key time interval:Bajocian
Age range of interval:170.30000 - 168.30000 m.y. ago
Stratigraphy
Geological group:Shaqra Formation:Dhruma
Local section:Coupe du Sud du Khashm al Hadafiyah Local bed:D2,2,above the base
Local order:bottom to top
Lithology and environment
Primary lithology: lithified "limestone"
Includes fossils?Y
Environment:lagoonal/restricted shallow subtidal Tectonic setting:cratonic basin
Geology comments: The Dhruma Fm essentially is composed of limestones and clayey rocks in its central outcrop zone but passes to detrial facies northwards and southwards.
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:48089
Authorizer:F. Fursich Enterer:S. Hicks
Modifier:S. Hicks Research group:marine invertebrate
Created:2005-03-13 09:37:34 Last modified:2005-03-14 04:46:41
Access level:the public Released:2005-03-13 09:37:34
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]