8th International Nannoplankton Association Conference
The Qom Formation is located in NC Iran. The regional geology of the area was first studied in 1971 by Stocklin. The Qom Formation, consisting of limestones and marls, has nine members (a-f). Member e of this formation is mostly marl and has never before been studied by palaeontologists, therefore the age of the Qom Formation has previously been assigned on the basis of its stratigraphic position. The calcareous nannofossils in these members are abundant and relatively diverse. Coccolithus pelagicus is the most common species and was found throughout the section. The presence of Sphenolithus belemnos, Helicosphaera ampliaperta, Calcidiscus macintyrei, Discoaster deflandrei and Sphenolithus heteromorphus indicates an age of Burdigalian-Langian, corresponding to NN4-NN5 of Martini's standard zonation.
Copyright © 2000, most recent revision July 24, 2000Tania Hildebrand-Habel (firstname.lastname@example.org)