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] |