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

Where: Saudi Arabia (25.0° N, 46.5° E: paleocoordinates 1.9° S, 34.4° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: A Member (Arab Formation), Kimmeridgian (157.3 - 152.1 Ma)

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

• The Arab Fm. (and Hith Anhydrite) show a rapid succession of four carbonate-evaporite sequences. Each sequence top is marked by environmental confinement and by the deposition of gypsum and anhydrite. Thes are of an early Kimmeridgian to Tithonian (?) age. The post mortem silting up and encrustation are typical of a protected environment in a very proximal infiltration zone of the shelf. The paleogeography was a very flat-lying and the water very shallow.

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 45607: authorized by Franz Fursich, entered by Simone Hicks on 17.11.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Architaenioglossa - Ampullinidae
Ampullina sp.
Ampullina sp. Férussac 1822 snail
 Sorbeoconcha - Naticidae
Natica sp.
Natica sp. Scopoli 1777 moon snail
 Sorbeoconcha - Strombidae
"Pterocera sp." = Lambis
"Pterocera sp." = Lambis Röding 1798 conch
Foraminifera
 Loftusiacea - Cyclamminidae
Everticyclammina sp.