Jabal Safra, Block 3, collection 103C (Triassic of Oman)

Where: Oman (22.7° N, 57.8° E: paleocoordinates 28.6° S, 53.9° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Spathian (251.3 - 247.2 Ma)

• Block 3. Stratigraphic thickness is 3.5 m, with stratification parallel to that of surrounding Guwayza beds. Width, 2-5 m.

• bed-level stratigraphic resolution

Environment/lithology: slope; lithified limestone

• 'The Hallstatt facies is generally interpreted as a pelagic deposit laid down far from any source of terrigenous sediment. Close juxtaposition of ammonoid zones is the general rule and indicates very low rates of sedimentation. The depth at which Hallstatt rocks formed has long been debated. A summary of views up to about 1970 is given in Tozer (1971). In that account a deep water environment was suggested but the arguments favouring deposition at about 200 m, as on seamounts, seem to be strongest (e.g. Jenkyns 1970).'
• 'The Early and Middle Triassic ammonoids occur in great abundance in very fine-grained limestone, mostly red, but in part grey or green. The colour, nature of the matrix, and abundance of ammonoids is the facies of the Hallstatt limestone.'

Size classes: mesofossils, microfossils

Reposited in the GSC

Primary reference: M. B. Koot, G. Cuny, M. J. Orchard, S. Richoz, M. B. Hart and R. J. Twitchett. 2015. New hybodontiform and neoselachian sharks from the Lower Triassic of Oman. Journal of Systematic Palaeontology 13:891-917 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 173257: authorized by Matthew Clapham, entered by Matthew Clapham on 14.09.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Chondrichthyes
  -
cf. Amelacanthus sp.
cf. Amelacanthus sp. Maisey 1982 elasmobranch
 Synechodontiformes -
Polyfaciodus pandus n. gen. n. sp., Safrodus tozeri n. gen. n. sp., Safrodus cf. tozeri
Polyfaciodus pandus n. gen. n. sp. Koot and Cuny 2014 elasmobranch
Safrodus tozeri n. gen. n. sp. Koot and Cuny 2014 elasmobranch
Safrodus cf. tozeri Koot and Cuny 2014 elasmobranch
 Hybodontiformes -
cf. Omanoselache sp., Omanoselache halli n. sp.
cf. Omanoselache sp. Koot et al. 2013 elasmobranch
Omanoselache halli n. sp. Koot and Cuny 2014 elasmobranch