نتایج جستجو برای: nannofossil

تعداد نتایج: 231  

Jalili, , Notghi Moghaddam, ,

Crystallography is the experimental science of determining the arrangement of atoms in crystalline solids. Calcareous nanoplankton are one of the most abundant calcite unicellular planktonic organisms on the Earth. This group include coccoliths which are formed from calcite crystals. They are one of the most important microfossil groups in biostratigraphic, paleontologyl and oil exploration stu...

Journal: :Palaeogeography, Palaeoclimatology, Palaeoecology 2021

Calcareous nannofossil biostratigraphy and carbon-isotope stratigraphy on bulk organics of the middle-upper Eocene Souar Formation (Tunisia) allow for a refined this interval in southwestern Neo-Tethys margin. The represents deepest sedimentary deposits central northern Tunisian Basin was only dated previously by coarse data planktonic foraminifera. Together with our new data, correlation is pr...

Journal: :Geological Society of America Bulletin 2022

Abstract During the Tertiary evolution of Western Mediterranean subduction system, a migrating foreland basin system developed between Maghrebian orogenic belt and adjacent African Craton. However, comprehensive reconstruction systems Rif Chain is still missing. By integrating field observations with quantitative biostratigraphic data from calcareous nannofossil assemblages, sandstone compositi...

Journal: :Bulletin of The Geological Society of Denmark 2021

The Faxe limestone quarry in eastern Denmark exposes Danian (Lower Paleocene) cool-water carbonate deposits. They constitute remnants of an apparent build-up that covers about 12 km2 today. deposits at are conspicuous due to their pronounced thickness coral relative the regional system. In quarry, scleractinian corals uniquely exposed up 30 m high mounds. rapid accumulation scleractinians combi...

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