Shaqra Group (middle Marrat1): Toarcian, Saudi Arabia
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Anthozoa
- Scleractinia
- Caryophylliidae
|
||||||||||
|
Thecocyathus sp.
Milne-Edwards and Haime 1848
|
||||||||||
|
Rhynchonellata
- Spiriferinida
- Spiriferinidae
|
||||||||||
|
Liospiriferina undulata
|
||||||||||
|
Bivalvia
- Pectinida
- Entoliidae
|
||||||||||
|
Entolium cf. corneaolum
|
||||||||||
|
Bivalvia
- Megalodontida
- Ceratomyopsidae
|
||||||||||
|
Ceratomyopsis cf. arabica
(Cox 1935)
|
||||||||||
|
Cephalopoda
- Ammonitida
- Hildoceratidae
|
||||||||||
|
Protogrammoceras masdagascariense
|
||||||||||
|
Gastropoda
- Discohelicidae
|
||||||||||
|
Discohelix douvillei
|
||||||||||
|
Nodosariata
- Vaginulinida
- Vaginulinidae
|
||||||||||
|
Lenticulina sp.
Lamarck 1804
|
||||||||||
|
Cyclamminidae
|
||||||||||
|
Pseudocyclammina liassica
|
||||||||||
| =Foram. | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Saudi Arabia |
| Coordinates: | 24.2° North, 46.1° East (view map) |
| Paleocoordinates: | 1.3° South, 34.1° East |
| Basis of coordinate: | stated in text |
| Geographic resolution: | outcrop |
Time
| Period: | Jurassic | Epoch: | Early/Lower Jurassic |
| Stage: | Toarcian | 10 m.y. bin: | Jurassic 3 |
| Key time interval: | Toarcian | ||
| Age range of interval: | 184.20000 - 174.70000 m.y. ago |
Stratigraphy
| Geological group: | Shaqra | Formation: | Marrat | ||
| Local section: | Khashm adh Dhibi | Local bed: | middle Marrat 1 | ||
| Local order: | bottom to top | ||||
| Stratigraphy comments: The Shaqra Group is composed of Arabian Shelf carbonate and contains terrigenous deposits. The group features 3 hiati: first of the Middle and Upper Bathonian, 2nd of the Lower Callovian and the base of the Middle Callovian and thirdly of the Lower Oxfordian between the Tuwaiq Mountain Limestone and the Hanifa Fm. | |||||
Lithology and environment
| Primary lithology: | lithified wackestone | ||
| Includes fossils? | Y | ||
| Environment: | lagoonal/restricted shallow subtidal | Tectonic setting: | cratonic basin |
| Geology comments: mesotidal, lagoonal and infralittoral environments | |||
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: | 45186 | ||
| Authorizer: | F. Fursich | Enterer: | S. Hicks |
| Modifier: | S. Hicks | Research group: | marine invertebrate |
| Created: | 2004-10-10 09:03:12 | Last modified: | 2005-03-15 06:39:31 |
| Access level: | the public | Released: | 2004-10-10 09:03:12 |
| 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] |