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

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Stephanoceratidae
Ermoceras arabicum
Ermoceras sp. Douvillé 1916
=s.sp.
Ermoceras coronatoides (Douvillé 1916)
Ermoceras splendens Arkell 1952
Ermoceras runcinatum Arkell 1952
Ermoceras elegans Douvillé 1916
recombined as Ermoceras (Kosmermoceras) elegans
Cephalopoda - Ammonitida - Perisphinctidae
Leptosphinctes sp.
Cephalopoda - Nautilida - Cenoceratidae
Metacenoceras sp. Tinant 1984
=n.sp.A=Naut.
Bivalvia - Ostreida - Eligmidae
Eligmus sp. Eudes-Deslongchampes 1856
Bivalvia - Ostreida - Palaeolophidae
Lopha solitaria (Sowerby 1824)
synonym of Actinostreon gregareum
Rhynchonellata - Rhynchonellida - Tetrarhynchiidae
Burmirhynchia termierae Rousselle 1965
Rhynchonellata - Terebratulida - Lobothyrididae
Tubithyris chouberti Rousselle 1965
Rhynchonellata - Terebratulida - Lissajousithyrididae
Monsardithyris ventricosa (Hartmann 1830)
Rhynchonellata - Terebratulida - Eudesiidae
Eudesia magharensis Farag 1960
recombined as Eudesia (Sphriganaria) magharensis
Echinoidea - Clypeidae
Clypeus sp. Leske 1778
=n.sp.2
Echinoidea - Holectypoida - Holectypidae
Holectypus depressus
Echinoidea
Leioechinus namus
Echinoidea - Salenioida - Acrosaleniidae
Acrosalenia sp. Agassiz 1840
=sp.A
Recrosalenia sp.
=n.sp.2
Echinoidea - Stomopneustoida - Stomechinidae
Polycyphus parvituberculatus
Echinoidea - Cidaroida - Rhabdocidaridae
Rhabdocidaris mogharensis
Anthozoa - Scleractinia - Zardinophyllidae
Epismiliopsis sp. Alloiteau 1952
=n.sp.2
Anthozoa - Scleractinia - Thamnasteriidae
Thamnasteria dumorti
see common names

Geography
Country:Saudi Arabia
Coordinates: 25.3° North, 45.5° East (view map)
Paleocoordinates:0.6° South, 33.7° 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:170.90000 - 168.20000 m.y. ago
Stratigraphy
Geological group:Shaqra Formation:Dhruma
Local section:Coupe du Graben Durma (near of Qasab) Local bed:D2,2
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:48112
Authorizer:F. Fursich Enterer:S. Hicks
Modifier:S. Hicks Research group:marine invertebrate
Created:2005-03-14 04:14:06 Last modified:2005-03-14 06:14:06
Access level:the public Released:2005-03-14 04:14:04
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]