calcareous nannofossils in boundary of tirgan and sarcheshmeh formations at qalezo section have been studied. this section is situated in the west of kopet-dagh basin. in this study 35 nannoplankton species of 17 genera were identified. according to the first occurrence of index species and fossil assemblages two calcareous nannofossil biozones (cc7-cc8) of sissingh (1997) have been recognized....

The present contribution provides a study of calcareous nannofossils and siliceous microfossils from the Sawai Bay Formation on Car Nicobar Island, northern Indian Ocean. Two stratigraphically short sediment intervals near have been examined. Qualitative quantitative microfossil analyses show ‘A’ Section to be devoid microfossils, while 24 well-preserved nannofossil taxa are identified. ‘B’ yie...

During IODP expedition 359 multiple holes recovered Modern to Middle Miocene sediments from the Kardiva Drift which is strongly influenced by monsoonally-driven currents. Two continued below drift into Lower that were deposited under rather different conditions following Oligocene subsidence of Maldives Ridge. These are characterised marked alternation between dark organic-rich sapropelic and p...

Spectral analyses of complementary lithologic and paleoecologic data sets from the Cenomanian-Turonian Bridge Creek Limestone are used to test for Milankovitch periodicities. Because the analyses quantitatively assess variance in the data sets through the study interval, they also offer a new method for evaluating relationships between different components of the depositional system. The analys...

A 95 m thick succession of grey siliceous limestone and marl on Mount Rettenstein in the Northern Calcareous Alps allowed us to study well-preserved diverse radiolarian assemblages across Sinemurian–Pliensbachian boundary. The distribution 31 most characteristic species is presented. Ammonites Jamesoni Subzone, topmost subzone Zone, have been previously found upper part section. data are comple...

A suite of outcrop samples from the Cauvery Basin belonging to mudrock-claystone dominated Karai Formation were analysed for nannofossil biostratigraphy in two newly measured sections at and Garudamangalam. The age Section is interpreted as early Albian Turonian, whereas Garudamangalam late Cenomanian. ‘BC’ zones Bown et al. (1998) are applicable both sections, Cenomanian Turonian ‘UC’ Burnett ...

Abstract The first detailed mapping and recording of nannofossils was carried out on Kei Besar Island, Southeast Maluku. This area is mostly composed the Elat Formation, which mainly by intercalated calcarenite calcareous claystone. Total 48 samples were taken three measured sections (Hollat, Ngurdu Mata Hollat). Samples prepared using smear slide method, then observed under a polarized microsc...