Solid Earth Sciences (S)
Session Sub-category Geology(GL)
Session ID S-GL19
Title Frontier research on chronostratigraphic unit boundaries
Short Title Chronostratigraphic unit boundaries
Main Convener Name Hiroyuki Hoshi
Affiliation Aichi University of Education
Co-Convener 1 Name Reishi Takashima
Affiliation Tohoku University Museum, Tohoku University
Co-Convener 2 Name Junichiro Kuroda
Affiliation Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, the University of Tokyo
Co-Convener 3 Name Makoto Okada
Affiliation Department of Earth Sciences, College of Science, Ibaraki University
Session Language 
J
Scope 
This session aims to share the current knowledge on stratigraphy, geochronology, geochemistry, paleoclimatology, and paleoceanography at or around chronostratigraphic unit boundaries. Geological studies dealing with chronostratigraphic unit boundaries, such as the Permian-Triassic (P-T) and Cretaceous-Paleogene (K-Pg) boundaries, as well as boundaries between systems (periods), series (epochs), stages (ages), and other chronozones (chrons) are welcome. We also welcome studies on global events such as oceanic anoxic events (OAEs), asteroid impacts, and geomagnetic reversals, as well as the lithostratigraphy, tephrostratigraphy, sequence stratigraphy, biostratigraphy, chemostratigraphy, magnetostratigraphy, radiometric dating, tectonics, etc. of rock sequences above or below the chronostratigraphic unit boundaries in Japan and elsewhere.
Presentation Format Oral and Poster presentation
Invited Authors Masayuki Ikeda (University of Tokyo)
Time Presentation No Title Presenter
Oral Presentation May 28 AM2
10:45 - 11:00 SGL19-01 Astrochronology and radiometric ages for orbital-scale dynamics across the geologic stage boundaries Masayuki Ikeda
11:00 - 11:15 SGL19-02 Reconstruction of the Cretaceous continental arc–trench system of the Japanese Islands: Cretaceous stratigraphic correlation for Cretaceous palaeoenvironmental studies Hisao Ando
11:15 - 11:30 SGL19-03 Age and duration of the Aptian OAE1a determined by integrated carbon, osmium isotope, and planktonic foraminiferal stratigraphy and U-Pb dating in the Yezo Group, Hokkaido. Reishi Takashima
11:30 - 11:45 SGL19-04 Osmium isotopic records and abundances of platinum group elements of the Cretaceous-Paleogene boundary in the Nemuro Group Hayu Ota
11:45 - 12:00 SGL19-05 A geomagnetic excursion detected at the lower Matuyama reversed polarity chronozone in a marine Pleistocene sequence distributed in the southernmost Boso Peninsula Makoto Okada
Presentation No Title Presenter
Poster Presentation May 28 PM3
SGL19-P01 Correlation of the Lower Cretaceous Weissert Event in NW Pacific. Taiga Tomaru
SGL19-P02 Magnetostratigraphy and paleomagnetic rotation of the Nemuro Group in the Shiranuka Hill area, eastern Hokkaido Hiroyuki Hoshi
SGL19-P03 Paleomagnetism of the Shukunohora Formation of the Miocene Mizunami Group in central Japan: Did a paleoparadoxiid witness the Japan Sea opening? Hiroyuki Hoshi
SGL19-P04 A magneto-oxygen isotopic stratigraphy using an oriented boring core drilled through the Quaternary base horizon in the southernmost Boso Peninsula, Japan Makoto Okada