Shaqra Group (Tuwaiq Mt.Lst.T3,3) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (24.5° N, 46.4° E: paleocoordinates 1.7° S, 34.0° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Tuwaiq Mt.Lst. Formation (Shaqra Group), Callovian (166.1 - 163.5 Ma)

Environment/lithology: lagoonal or restricted shallow subtidal; lithified framestone

• The Tuwaiq Mt. Lst. of middle to late Callovian age; locally clayey at the base; this predominantly calcareous formation determines the characteristic relief of central Arabia (Jabal Tuwayq); it is a reef platform. The condensed layers at the base of T3 mark the maximum stages of the Jurassic transgression.
• massive limestone, coarse furcations and clasts, accidentially distributed siliceous components

Size classes: macrofossils, microfossils

Collection methods: bulk, mechanical,

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 45558: authorized by Franz Fursich, entered by Simone Hicks on 09.11.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Foraminifera
 Lituolacea - Nautiloculinidae
Nautiloculina oolithica
 Textulariina - Pfenderinidae
Kurnubia ex gr. palastiniensis
 Involutinina - Trocholinidae
Trocholina sp.
Trocholina sp. Paalzow 1922
=sp.2=Foram.
Coccolithophyceae
 Braarudosphaerales - Polycyclolithaceae
"Tetralithus cf. gothicus" = Uniplanarius gothicus
"Tetralithus cf. gothicus" = Uniplanarius gothicus Deflandre 1959
=nannoflora
 Watznaueriales - Watznaueriaceae
Cyclagelosphaera margereli