scholarly journals Age Model and Oxygen Isotope Stratigraphy of Site ODP1202 in the Southern Okinaw a Trough, Northwestern Pacific

2005 ◽  
Vol 16 (1) ◽  
pp. 001 ◽  
Author(s):  
Kuo-Yen Wei ◽  
Horng-Sheng Mii ◽  
Chi-Yue Huang
Keyword(s):  
Oxygen Isotope ◽  
Northwestern Pacific ◽  
Oxygen Isotope Stratigraphy ◽  
Age Model ◽  
Isotope Stratigraphy

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.

Oxygen Isotope Stratigraphy

2020 ◽  
pp. 279-307
Author(s):  
E.L. Grossman ◽  
M.M. Joachimski
Keyword(s):  
Oxygen Isotope ◽  
Oxygen Isotope Stratigraphy ◽  
Isotope Stratigraphy

Graphic correlation of oxygen isotope stratigraphy application to the Late Quaternary

1986 ◽  
Vol 1 (2) ◽  
pp. 137-162 ◽  
Author(s):  
Warren L. Prell ◽  
John Imbrie ◽  
Douglas G. Martinson ◽  
Joseph J. Morley ◽  
Nicklas G. Pisias ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Late Quaternary ◽  
Oxygen Isotope Stratigraphy ◽  
Isotope Stratigraphy

scholarly journals Flowstones from the Račiška Pečina Cave (SW Slovenia) Record 3.2-Ma-Long History

2021 ◽  
Vol 48 (1) ◽  
pp. 31-45
Author(s):  
P. Sierpień ◽  
J. Pawlak ◽  
H. Hercman ◽  
P. Pruner ◽  
N. Zupan Hajna ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Environmental Conditions ◽  
Marine Isotope Stage ◽  
Lower Segment ◽  
Oxygen Isotope Stratigraphy ◽  
Isotope Stratigraphy ◽  
Main Factors ◽  
Mis 5 ◽  
Sw Slovenia ◽  
Karstic Environment

Abstract Establishing a chronology of events is a critical step in reconstructing the palaeoclimate and it is important for all types of environmental records, including speleothems. Here, we analysed a unique series of flowstones deposited between 3.2 Ma (marine isotope stage (MIS) Km3) and 0.08 Ma (MIS 5). The studied flowstones are located in a classic karstic environment, the Račiška Pečina Cave in south-western Slovenia. Further, a detailed chronology of events was constructed based on oxygen isotope stratigraphy (OIS), combined with magnetostratigraphy and U-series dating. Two curves were selected as reference records where the LR04 record was used as the global curve and a Mediterranean record was used as the regional curve. The Račiška Pečina profile was divided into two segments separated by a principal disconformity. The lower segment correlated better with the regional Mediterranean curve, while the upper segment was with the global LR04 curve. These findings suggest that the main factors controlling environmental conditions in the cave area changed between 3.2 and 0.8 million years ago.

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