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  Paleontology
Calcareous Nannofossils of Iran
Author : Fatemeh Hadavi
Publisher date : October 2002
Chapter title : Second Chapter - Biostratigraphy
Data title : Studies History of Calcareous Nonnofossils

As mentioned before, Nonnofossils calcareous Mesozoic and Cenozoic sediments in all the containing calcium carbonate (marl deposits, and especially Chalky and shale) are affected by changes, has not been diagenesis severe weathering, are found in high concentration. The first report about Nannoplanktons by a German biologist named (CG Ehrenberge) in 1836 is presented. There are a bunch of his creatures and the elliptical shape of the disc White Island (Rugen) reported their source of inorganic considered. In 1861, (HC) and (GCWallich) Coccolith concluded that part of the larger spherical bodies were coccospheres name. Different studies on the biology Coccolith continued reports in this case was released. Benefits and application of environmental indicators Nonnofossils folds up as 1954 was unclear but there this year (MNBramlette) and  Tertiary and Mesozoic fossil collection specify and use them, especially the global starolites in pelagic sediments were applicable, they emphasized. The motivation factor required for collecting microfossils, fossil collections in American and European astronomers were decades later. In late 1960, experts in the field of knowledge and range of biological fossil Nannoflourite vertical (vertical range), especially in the case had reached various stages of the Cenozoic zonation Biology - folds were needed be done, and many people such as (WWHaq) (MN Bramlette) and colleagues, and (Martini) efforts in this field and have many biological zonation - folds for regions with different latitudes presented. In recent years, growing in calcareous Nonnofossils Laboratory, Biology Nonnofossils alive, and environmental studies - folds based on calcareous Nonnofossils increased. 


Nannofossil student in Iran is very new and relatively poor. In 1979 (BUHaq) report entitled "Nannoflourite West Paleocene - Paleocene top center and Iran - Eocene of Pakistan" to describe some of Nonnofossils explored.

F - Hadavi in ​​1363 for Section E of the Qom Formation Dating study Nonnofossils marl deposits in the cross section Kamarkuh explored. He studied Mtaqbadr 1368 Nonnofossils calcareous marl deposits lateral area of ​​littoral zone and then in 1371 to Dating whale fossils found in the coastal area of ​​Makran, Nonnofossils the calcareous deposits will read. AS - in 1371 in a brief study Nannoplanktons calcareous sedimentary sequence in the region lower Maastrichtian yes pickles ferns, some of these areas Nannoplanktons limestone has identified and photographed. Since then several studies in this regard by the author in the form of research projects and master thesis, especially in biology - folds Kopet Dagh region (North-East of Iran) has been done. As it was mentioned before, Nonnofossils Triassic limestone in the top part appeared and also found in the oceans current. Recalling that Nannoplanktons from Triassic and Jurassic in Iran still not been studied. In this article Nonnofossils in Kopet Dagh region (source formations, water long, bitter water, and forty Khangiran arc) and the Qom Formation (sections Kamarkuh, Pasangan, Dochah) and Makran region are introduced and photographed. Since the age range provided Nonnofossils sometimes encompasses two or more formations may make the collection of any fossil species, some are repetitive. Stratigraphy columns are for different formations and possible measure was introduced. But because the samples were dispersed to Makran and deposits dating for my study referred to level stratigraphy is not considered.


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