Shaqra Group (lower Dhruma D1,4): Bajocian, Saudi Arabia
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Progonocythere sp.
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| =Ostrac. | ||||||||||
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Coccolithophyceae
- Braarudosphaerales
- Polycyclolithaceae
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Tetralithus cf. gothicus
Deflandre 1959
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| recombined as Uniplanarius gothicus | ||||||||||
| =nannoflora | ||||||||||
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Coccolithophyceae
- Schizosphaerellaceae
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Schizosphaerella punctulata
Deflandre and Dangeard 1938
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| =nannoflora | ||||||||||
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Coccolithophyceae
- Watznaueriales
- Watznaueriaceae
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Ellipsagelosphaera britannica
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| synonym of Watznaueria | ||||||||||
| =nannoflora | ||||||||||
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Ammodiscidae
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Glomospira sp.
Rzehak 1895
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Nodosariata
- Vaginulinida
- Lagenidae
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Lingulina sp.
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Nodosariata
- Nodosariida
- Nodosariidae
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Frondicularia sp.
Defrance 1824
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Ostracoda
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Amicytheridea dierallaensis
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| =Ostrac. | ||||||||||
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Ostracoda
- Platycopida
- Cytherellidae
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Cytherella aff. index
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Ostracoda
- Podocopida
- Bairdiidae
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Bairdia cf. hilda
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Ostracoda
- Podocopida
- Progonocytheridae
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Kinkelinella sp.
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| =sp.sp. | ||||||||||
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Ostracoda
- Podocopida
- Cytherideidae
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Schuleridea triangularis
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Gastropoda
- Aporrhaidae
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Aporrhais sp.
da Costa 1778
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Gastropoda
- Naticidae
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Ampullaria sp.
Lamarck 1799
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| spelled with current rank as Natica (Ampullaria) | ||||||||||
| =Gastr. | ||||||||||
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Bivalvia
- Ostreida
- Gryphaeidae
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Catinula knorri
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| spelled with current rank as Gryphaea (Catinula) | ||||||||||
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Bivalvia
- Ostreida
- Eligmidae
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Eligmus cf. analites
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Cephalopoda
- Ammonitida
- Sonniniidae
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Shirbuirnia sp.
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Rhynchonellata
- Rhynchonellida
- Tetrarhynchiidae
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Burmirhynchia sp. n. sp.
Buckman 1917
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| =n.sp.1 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Saudi Arabia |
| Coordinates: | 24.2° North, 46.6° East (view map) |
| Paleocoordinates: | 2.0° South, 34.1° 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: | Khashm adh Dhibi | Local bed: | lower Dhruma D1,4 |
| Local order: | bottom to top |
Lithology and environment
| Primary lithology: | lithified "limestone" | ||
| Includes fossils? | Y | ||
| Includes fossils? | Y | ||
| Lithology description: The Dhruma Fm essentially is composed of limestones and clayey rocks in its central outcrop zone but passes to detrial facies northwards and southwards | |||
| Environment: | lagoonal/restricted shallow subtidal | Tectonic setting: | cratonic basin |
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: | 45265 | ||
| Authorizer: | F. Fursich | Enterer: | S. Hicks |
| Modifier: | S. Hicks | Research group: | marine invertebrate |
| Created: | 2004-10-17 05:17:54 | Last modified: | 2005-03-15 08:08:10 |
| Access level: | the public | Released: | 2004-10-17 05:17:54 |
| 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] |