Jebel Madar [Nahr Umr Fm] (Cretaceous of Oman)

Where: Oman (22.4° N, 58.1° E)

• Paleocoordinates: 7.3° S, 56.6° E (Wright 2013)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Nahr Umr Formation (Wasia Group), Early/Lower Albian (112.0 - 109.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Nahr Umr Fm, which overlies (unconformably) the Shuaiba Fm (Early Aptian), and is overlain by the Natih Fm (Latest Albian to early Turonian. AGE: Lower to lower Middle Albian, on the basis of ammonite and microfossil biostratigraphy. STRATIGRAPHIC POSITION: From middle part of formation.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, calcareous shale

• ENVIRONMENT: Shallow marine siliciclastic setting.
• SPECIFIC LITHOLOGY: Calcareous shales. LITHIFICATION: Lithified on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collected by Simmons; reposited in the OUM

• COLLECTOR: M. Simmons. REPOSITORY: Oxford University Museum (OUM).

Primary reference: W. J. Kennedy and M. D. Simmons. 1991. Mid-Cretaceous ammonites and associated microfossils from the Central Oman Mountains. Newsletters on Stratigraphy 25(3):127-154 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 82358: authorized by Austin Hendy, entered by Austin Hendy on 26.07.2008

Creative Commons license: CC0 (CC0)

Taxonomic list

• COVERAGE: Limited to ammonoidea and foraminifera listed in taxonomic publication. NOMENCLATURE: Authoritative publication, with modern nomenclature and species-level assignments.
Show authors, comments, and common names
Foraminifera
 Lituolida - Lituolidae
Lituola sp.
 Orbitolinacea - Orbitolinidae
Mesorbitolina subconcava
 Globigerinina - Hedbergellidae
Praeglobotruncana sp.
Cephalopoda
 Ammonitida - Knemiceratidae
Knemiceras dubertreti
Knemiceras dubertreti Basse 1940 ammonite