scholarly journals Calcareous nannofossil biostratigraphy of the Middle Miocene Kinone and lower Amatsu Formations in the Boso Peninsula, central Japan.

1998 ◽  
Vol 104 (12) ◽  
pp. 877-890 ◽  
Author(s):  
Isao Mita ◽  
Masaki Takahashi
Keyword(s):  
Middle Miocene ◽  
Calcareous Nannofossil ◽  
Central Japan ◽  
Boso Peninsula ◽  
Calcareous Nannofossil Biostratigraphy

scholarly journals Foraminiferal, ostracod, and calcareous nannofossil biostratigraphy of the latest Badenian – Sarmatian interval (Middle Miocene, Paratethys) from Poland, Romania and the Republic of Moldova

2017 ◽  
Vol 68 (5) ◽  
pp. 419-444 ◽  
Author(s):  
Simina Dumitriţa Dumitriu ◽  
Sergiu Loghin ◽  
Zofia Dubicka ◽  
Mihaela Carmen Melinte-Dobrinescu ◽  
Jolanta Paruch-Kulczycka ◽  
...  
Keyword(s):  
Middle Miocene ◽  
Calcareous Nannofossil ◽  
Republic Of Moldova ◽  
Calcareous Nannofossil Biostratigraphy ◽  
The Republic ◽  
Foraminiferal Distribution

Abstract This study presents detailed foraminiferal, ostracod, and calcareous nannofossil analyses of five Middle Miocene sections located in the Central Paratethyan realm, namely in Poland, Romania and the Republic of Moldova. Based on foraminiferal distribution, five biostratigraphically important assemblages (labelled A-E) are distinguished. Foraminifera data combined with ostracoda and nannofossil evidence allowed correlation between the studied sections, and a comparison with the deposits of similar age from the Transylvanian, Vienna and Pannonian basins, as well as with the Transcarpathian regions. The micropaleontological record across the Badenian-Sarmatian boundary interval is also presented.

Oxygen isotope stratigraphy and calcareous nannofossil biostratigraphy of the Lower Pleistocene in the Boso Peninsula, central Japan

Stratigraphy ◽  
2021 ◽  
Vol 18 (2) ◽  
Author(s):  
Daisuke Kuwano ◽  
Yoshimi Kubota ◽  
Kanako Mantoku ◽  
Koji Kameo
Keyword(s):  
Oxygen Isotope ◽  
Northwestern Pacific ◽  
Calcareous Nannofossil ◽  
Boso Peninsula ◽  
Oxygen Isotope Stratigraphy ◽  
Age Model ◽  
Calcareous Nannofossil Biostratigraphy ◽  
Isotope Stratigraphy ◽  
Pacific Coast Of Japan ◽  
Cyclic Changes

ABSTRACT: Oxygen isotope stratigraphy and calcareous nannofossil biostratigraphy in the upper part of the Kiwada Formation, which is part of the Kazusa Group in the Boso Peninsula in the central part of the Pacific coast of Japan, were examined to establish a high-resolution age model and estimate the age of the lower part of Pleistocene nannofossil biohorizons in the northwestern Pacific region. The new age model indicates that the upper part of the Kiwada Formation corresponds to Marine Isotope Stage (MIS) 41 through MIS 36. Two nannofossil biohorizons, the last occurrences of large forms of Gephyrocapsa (>5.5 micrometers) and Helicosphaera sellii,were recorded in the examined section. The LO of large Gephyrocapsa spp. coincides with the MIS 37/38 boundary which is 1241.2 plus or minus 0.4 ka. The LO of H. sellii is located in late MIS 40 and has a calculated age of 1291.4 plus or minus 1.4 ka. These biohorizons are traceable even though the LO of H. sellii is a diachronous event. Size variations of Gephyrocapsa from approximately 1250 ka are discussed and fluctuations of small size Gephyrocapsa could represent cyclic changes of the Kuroshio and Oyashio currents.

Middle Miocene Quantitative Calcareous Nannofossil Biostratigraphy in the Mediterranean Region

1996 ◽  
Vol 42 (1) ◽  
pp. 37 ◽  
Author(s):  
Eliana Fornaciari ◽  
Agata Di Stefano ◽  
Domenico Rio ◽  
Alessandra Negri
Keyword(s):  
Mediterranean Region ◽  
Middle Miocene ◽  
Calcareous Nannofossil ◽  
Calcareous Nannofossil Biostratigraphy ◽  
The Mediterranean
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