Japan Geoscience Union Meeting 2015

Session information

Oral

Symbol B (Biogeosciences) » B-PT Paleontology

[B-PT27] End-Proterozoic/Phanerozoic biodiversity change: extinction and radiation

Sun. May 24, 2015 11:00 AM - 12:45 PM 104 (1F)

Convener:*Yukio Isozaki(Department of Earth Science and Astronomy, Multi-disciplinary Sciences - General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo), Yusuke Sawaki(Tokyo Institute of Technology), Chair:Yukio Isozaki(Department of Earth Science and Astronomy, Multi-disciplinary Sciences - General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo)

Biotic evolution was the consequence of repeated extinction and following diversification in the past, which was caused by large-scale environmental changes, in particular, by extremely rapid and drastic forcing that changed the environments of the biosphere. Irreversible and episodic episodes, such as the changes in material cycling by mantle plume and the increase in cosmic radiation by the encounter with dark cloud, are nominated as major driving mechanisms for the alleged rapid, large-scale environmental perturbations. As to the biodiversity change in the end-Proterozoic to Phanerozoic, many essential questions are still not answered yet by the conventional viewpoints and procedures.
This session discusses the Phanerozoic biodiversity change under a new light of the recent progress in geology.

12:33 PM - 12:36 PM

*Momoko SHIMATSUKA1, Yukio ISOZAKI2, Tomomi KANI3, Akira ISHIKAWA4 (1.Department of Earth and Planetary Science - Graduate School of Science, The University of Tokyo, 2.Department of Earth Science and Astronomy, Multi-disciplinary Sciences - General Systems Studies, Gr, 3.Department of Earth and Environmental Sciences, Kumamoto University, 4.Department of Earth Science and Astronomy, The University of Tokyo)