D. Jabal Ar Rann (Ordovician of Oman)

Where: Oman (25.4° N, 56.1° E: paleocoordinates 33.9° S, 131.9° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Tanuchitina fistulosa other zone, Upper Member (Rann Formation), Katian (453.0 - 445.2 Ma)

• member-level stratigraphic resolution

Environment/lithology: foreshore; lithified, brown, green siltstone and lithified, brown, green sandstone

• These are also shallow-marine shelfal deposits, representing a return of sand supply and storm-conditions where beds are deposited rapidly and shell fragments are generally not concentrated in shell beds or lag. The lack of Cruziana and bioturbation suggests bottom conditions that were anoxic or too high energy. The latter seems improbable given the fine silt-sand grain size. It seems likely that the fauna present locally, was washed in.
• Green-brown silts and sands, lacking bioturbation and with rare shell beds and faunas. The sands are horizontally laminated and swaley cross-stratified. Trace fossils are uncommon, and where they do occur are small simple burrows on bedding surfaces.

Size classes: macrofossils, mesofossils, microfossils

Preservation: cast, mold/impression

Reposited in the BMNH

Primary reference: R. A. Fortey, A. P. Heward, and C. G. Miller. 2011. Sedimentary facies and trilobite and conodont faunas of the Ordovician Rann Formation, Ras Al Khaimah, United Arab Emirates. GeoArabia 16(4):127-152 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 192974: authorized by Pete Wagner, entered by Pete Wagner on 28.04.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Protozoa
  -
Tanuchitina fistulosa
Trilobita
 Trinucleida - Trinucleidae
Deanaspis seftenbergii
Deanaspis seftenbergii Hawle and Corda 1847 trilobite
Deanaspis goldfussii seftenbergii
 Phacopida - Calymenidae
"Vietnamia teichmulleri" = Vietnamia teichmuelleri
"Vietnamia teichmulleri" = Vietnamia teichmuelleri Hammann and Leone 1997 trilobite
 Phacopida - Dalmanitidae
Dreyfussina cf. taouzensis