calcareous nannofossil assemblages recovered from a long, continuous section have been described from the sarayan region in lut block in east iran. the marine upper cretaceous sediments of this section yield medium diverse and well-preserved calcareous nannofossil assemblages. a structural analysis of upper cretaceous calcareous nannofloras has revealed 30 nannofossil species. a revised zonatio...

The Vergol locality (Montbrun-les-Bains, South-East France), a candidate section for the Valanginian GSSP (Global Stratotype Section and Point), was studied in detail ammonites calcareous nannofossils. A bed-by-bed sampling quantitative approach were carried out on this expanded succession presenting continuous record of calcareous-marl alternations covering uppermost Berriasian lowermost Valan...

Abstract The use of calcareous nannofossils for provenance analysis is a new-old topic cultural heritage. Several studies have already mentioned it ceramic, but less paintings. Preparatory layers the paintings are often made with chalk, which composed microfossils. To extract assemblage from painting layer, we need to disaggregate it. method plunge micro-samples into water and heat if alone doe...