The quantitative analysis of the calcareous nannofossil content yield in 600 m thick succession drilled at ODP Site 1123 (offshore New Zealand), considered as a reference section for Southern Ocean region, allowed recognition 43 bioevents distributed along last 20 Myr. correlation with excellent magnetostratigraphic record resulted attribution numerical ages position detected horizons. Many mar...

in this research, calcareous nannofossils of the upper cretaceous deposits of the souteast lar have been investigated. the upper cretaceous deposits have a thickness of 173 meters and consist of thick layers of marl and marly limestone. for introducing calcareous nannofossil assemblages and biozones, 141 slides of the gurpi formation in southeast of lar area have been studies which led to ident...

Adercotryma glomeratum is one of the most geographically and bathymetrically widespread species of Recent deep-sea benthic foraminifera, but the evolutionary history of this distinct agglutinated species is poorly known. In addition to one or two Recent species probably closely related to A. glomeratum, the Eocene-Oligocene species Adercotryma agterbergi has been described, but we suggest that ...

Four sites (953−956) were drilled north and south of Gran Canaria during Leg 157. The penetrated pelagic and volcaniclastic sediments can be identified by their different chemical compositions. This paper focuses on the volcaniclastic deposits that were logged in Holes 953C, 955A, and 956B. The sediments in these holes are mainly composed of hemipelagic, fine-grained nannofossil oozes with inte...

calcareous nannofossil assemblages of the boundary paleocene-eocene deposits (pabdeh formation) of the zagros, dezful embayment-mansouri oilfield have been studied in detail. it consists of shale and grey marlstone with inter layers of calcareous argillites and marly claystone. we present a study focused on changes in calcareous nannofossils of the pabdeh formation during the paleocene/eocene b...

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...