Shaqra Group (Dhruma Fm.) (Jurassic of Saudi Arabia)

Where: Saudi Arabia (21.2° N, 45.5° E: paleocoordinates 4.2° S, 31.9° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dhruma Formation (Shaqra Group), Bathonian (168.3 - 166.1 Ma)

Environment/lithology: lagoonal or restricted shallow subtidal; lithified 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 48316: authorized by Franz Fursich, entered by Simone Hicks on 16.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

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Rhynchonellata
 Rhynchonellida - Tetrarhynchiidae
Daghanirhynchia daghaniensis
Cephalopoda
 Nautilida - Paracenoceratidae
Paracenoceras sp.
Paracenoceras sp. Spath 1927 nautiloid
 Ammonitida - Stephanoceratidae
Micromphalites clydocromphalus
Micromphalites clydocromphalus Arkell 1952 ammonite
Bivalvia
 Cardiida - Arcticidae
Isocyprina sp.
Isocyprina sp. Röder 1882 clam