scholarly journals Recent development of calcareous nannofossil biostratigraphy and its application. Neogene and Quaternary stratigraphy of offshore Joban based on calcareous nannofossils.

1999 ◽  
Vol 64 (1) ◽  
pp. 16-27 ◽  
Author(s):  
Koji Kameo ◽  
Tokiyuki Sato
Keyword(s):  
Calcareous Nannofossils ◽  
Calcareous Nannofossil ◽  
Quaternary Stratigraphy ◽  
Calcareous Nannofossil Biostratigraphy

scholarly journals Direct correlation of Tithonian/Berriasian boundary calpionellid and calcareous nannofossil events in the frame of magnetostratigraphy: new results from the West Balkan Mts, Bulgaria, and review of existing data

2017 ◽  
Vol 46 (2) ◽  
pp. 47-56
Author(s):  
Iskra Lakova ◽  
Jacek Grabowski ◽  
Kristalina Stoykova ◽  
Silviya Petrova ◽  
Daniela Reháková ◽  
...  
Keyword(s):  
Magnetic Polarity ◽  
Calcareous Nannofossils ◽  
Calcareous Nannofossil ◽  
The West ◽  
Large Interval ◽  
History Museum ◽  
Specific Behaviour ◽  
Calcareous Nannofossil Biostratigraphy ◽  
Lower Berriasian ◽  
Events Data

Magnetostratigraphy, calpionellid and calcareous nannofossil biostratigraphy of the upper Tithonian and lower Berriasian of section Barlya in the West Balkan Mts are herein presented. The studied interval comprises the magnetozones from M21r to M17r, with a large interval of partial remagnetization. It has been directly correlated with a continuous succession of the calpionellid Chitinoidella, Praetintinnopsella, Crassicollaria and Calpionella zones, and with the nannofossil zones from NJT 15b to NK-1. The accumulated evidence in the last twenty years on the magnetostratigraphy, calpionellid and calcareous nannofossil biostratigraphy and events across the J/K boundary in the European Tethys has provoked the authors to plot the main micropalaeontological events against magnetostratigraphic column in order to assess the extent of diachronism of these events. Data from Slovakia, Poland, Italy, Austria, Hungary, France, Spain and Bulgaria has shown specific behaviour of different calpionellid and nannofossil events with respect to the column of the magnetic polarity chrons, which have been considered as ‘isochronous’ or at least less diachronous than the microfossil events. Thus, some rather consistent events have appeared, such as the first occurrences (FOs) of calpionellids Calpionella grandalpina, Crassicollaria brevis, Calpionella minuta and Remaniella ferasini, and the FOs of calcareous nannofossils Nannoconus globulus minor, Hexalithus geometricus, Nannoconus wintereri, Nannoconus steinmannii minor and Nannoconus kamptneri minor. The J/K boundary, as widely accepted, has been traced in section Barlya at the base of the Calpionella alpina Subzone.Financial support from the Synthesys Program at the National History Museum, Stockholm, is gratefully acknowledged.

scholarly journals Calcareous Nannofossil Biostratigraphy and Ostracoda Paleoecology of Hartha Formation from Balad (1) well, Central Iraq

2021 ◽  
pp. 3962-3972
Author(s):  
Omar Ahmed Al-Badrani ◽  
Faris Nejris Hassan ◽  
Mahfoudh Abdulla Al-Hadeedy
Keyword(s):  
Continental Shelf ◽  
Outer Shelf ◽  
Calcareous Nannofossils ◽  
Calcareous Nannofossil ◽  
Inner Shelf ◽  
Calcareous Nannofossil Biostratigraphy ◽  
Stratigraphic Ranges

Seventeen samples of Hartha Formation in Balad (1) well, central Iraq, are studied on the basis of stratigraphic ranges of the recorded calcareous nannofossils for twenty species belonging to twelve genera. The studied section reveals three biozones arranged from oldest to youngest as follows; (1) Calculites ovalis Interval Biozone (CC19), (2) Ceratolithoides aculeus Interval  Biozone (CC20), (3) Quadrum  sissinghii Interval Biozone (CC21). These Biozones are correlated with other calcareous nannofossils biozones from both local and regional sections, leading to conclude the age of the Middle Campanian. Rerecorded eighteen ostracode species that belong to eleven genera are identified, all of which were previously recorded from Iraq and adjacent regions. The occurrence of these species leads to conclude a continental shelf environment, while they are typical of inner shelf-outer shelf depth.

Earliest Miocene calcareous nannofossil biostratigraphy from the low-latitude Pisco Basin (Peru)

Stratigraphy ◽  
2019 ◽  
Vol 16 (2) ◽  
pp. 87-105
Author(s):  
Emilia R. Belia ◽  
Kevin E. Nick ◽  
Erika Bedoya Agudelo ◽  
David K. Watkins
Keyword(s):  
Calcareous Nannofossil ◽  
Low Latitude ◽  
Calcareous Nannofossil Biostratigraphy

Microfacies analysis, planktonic foraminifera, and calcareous nannofossil biostratigraphy in the Campanian sequences, Kurdistan region, NE Iraq

2021 ◽  
Vol 14 (2) ◽  
Author(s):  
Sawsan Hameed Al-Hazaa ◽  
Rawand Bakir Noori Jaff ◽  
Fadhil Ahmed Ameen Lawa ◽  
Azam Mahanipour ◽  
Khaled Al-Kahtany
Keyword(s):  
Planktonic Foraminifera ◽  
Microfacies Analysis ◽  
Kurdistan Region ◽  
Calcareous Nannofossil ◽  
Calcareous Nannofossil Biostratigraphy

scholarly journals High resolution integrated microbiostratigraphy of the Lower Jurassic (late Pliensbachian–early Toarcian) of central Italy

1998 ◽  
Vol 17 (2) ◽  
pp. 153-172 ◽  
Author(s):  
Raffaella Bucefalo Palliani ◽  
Emanuela Mattioli
Keyword(s):  
High Resolution ◽  
Evolutionary History ◽  
Central Italy ◽  
Lower Jurassic ◽  
High Potential ◽  
Calcareous Nannofossils ◽  
Calcareous Nannofossil ◽  
Dinoflagellate Cyst ◽  
History Of ◽  
Global Events

Abstract. The integrated use of calcareous nannofossil and dinoflagellate cyst events in a study of the late Pliensbachian–early Toarcian interval in central Italy has yielded a high resolution biostratigraphy. The use of both the first and last occurrences of selected taxa belonging to the two phytoplankton groups allows the dating of the sediments with a very refined detail, even when lithologies are unfavourable to the preservation of one fossil group. The evolutionary history of calcareous nannofossils and dinoflagellate cysts during the early Jurassic and its links with global events are responsible for the high potential of this integrated biostratigraphy.

scholarly journals Calcareous nannofossil biostratigraphy of Eocene oil shales from central Jordan

GeoArabia ◽  
2014 ◽  
Vol 19 (1) ◽  
pp. 117-140 ◽  
Author(s):  
Mohammad Alqudah ◽  
Mohammad Ali Hussein ◽  
Olaf G. Podlaha ◽  
Sander van den Boorn ◽  
Sadat Kolonic ◽  
...  
Keyword(s):  
Middle Eocene ◽  
Tectonic Setting ◽  
Planktonic Foraminifera ◽  
Calcareous Nannofossil ◽  
Current Analysis ◽  
Accommodation Space ◽  
Central Jordan ◽  
Age Model ◽  
Calcareous Nannofossil Biostratigraphy ◽  
Oil Shales

ABSTRACT Cretaceous and Paleogene marls, rich in total organic carbon, are widespread throughout Jordan and adjoining areas. Based on planktonic foraminifera these oil shales have been assigned a late Campanian–Paleocene age in previous studies. For the current analysis a total of 283 smear slides from five wells in central Jordan have been investigated for calcareous nannofossil biostratigraphy. Findings suggest a much more differentiated age model of the oil shales than previously proposed. The oil shales studied contain abundant calcareous nannofossil taxa of Eocene age along with varying abundances of Maastrichtian and Paleocene taxa. The encountered marker species Rhomboaster cuspis, Tribrachiatus bramlettei, Tribrachiatus orthostylus, Discoaster lodoensis, Coccolithus crassus, Discoaster sublodoensis, Nannotetrina quadrata, Reticulofenestra umbilicus and Chiasmolithus solitus, indicate an Early to Middle Eocene age, while the presence of Maastrichtian and Paleocene forms suggests major reworking. The presence of Cretaceous taxa reflects either subaerial erosive input from the hinterland or submarine reworking of Cretaceous strata within the basin. The highly variable amount of reworked material and associated deposition rates in the basin may represent changes in the tectonic setting during the Eocene. We propose that the high abundances of Cretaceous and Paleocene taxa reflect an increase in accommodation space by active graben flank movements. A dominance of Eocene taxa, on the other hand, indicates either periods of little accommodation space due to graben infill or inversion-type movements of the graben itself. In any case, the youngest Eocene and autochthonous taxa represent shallower or low topography graben phases.

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