Shaqra Group (Dhruma Fm.,D1,4,top) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (23.8° N, 46.3° E: paleocoordinates 2.2° S, 33.6° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dhruma Formation (Shaqra Group), Bajocian (170.3 - 168.3 Ma)

Environment/lithology: lagoonal or restricted shallow subtidal; lithified, argillaceous limestone

• The Dhruma Fm. essentially is composed of limestones and clayey rocks in its central outcrop zone but passes to detrial facies northwards and southwards.

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 48031: authorized by Franz Fursich, entered by Simone Hicks on 11.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Sonniniidae
Sonninia sp. n. sp., Sonninia (Euhoploceras) sp., Shirbuirnia cf. fastigata
Sonninia sp. n. sp. Douvillé 1879 ammonite
=n.sp.1 gr. arabica
Gastropoda
 Architaenioglossa - Ampullinidae
Globularia hemisphaerica
Globularia hemisphaerica Roemer 1836 snail
 Sorbeoconcha - Purpurinidae
Purpurina sp.
Purpurina sp. d'Orbigny 1850 periwinkle