Japan Geoscience Union Meeting 2019

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[J] Oral

H (Human Geosciences ) » H-QR Quaternary research

[H-QR05] Quaternary, Diachronic dynamics of human-environment interactions

Sun. May 26, 2019 1:45 PM - 3:15 PM 102 (1F)

convener:Mamoru Koarai(Earth Science course, College of Science, Ibaraki University), Ken Ikehara(Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology), Masayuki Hyodo(Research Center for Inland Seas, Kobe University), Chairperson:Mamoru KOARAI(Ibaraki University), Tomonori Naya(産業技術総合研究所)

2:30 PM - 2:45 PM

[HQR05-10] Stratigraphy of Tokyo Formation: re-examination of Kita-Ku Central Park core

*Tomonori Naya1, Kentaro Sakata1, Tsutomu Nakazawa1, Takehiko Suzuki2, Toshio Nakayama3 (1.Geological Survey of Japan, AIST, 2.Tokyo Metropolitan University, 3.Tokyo Metropolitan Government)

Keywords:Tokyo Formation, stratigraphy, drill core

We re-examined the Kita-ku Central Park core to examine the stratigraphy of Tokyo Formation. Several depositional cycles consistent with gravels, sands and mud were observed at shallower than the depth 30 m of this core. A pumice layer was found at about 15 m depth of this core, which can be correlated with Km2 tephra of the Kamiizumi Formation of Shimosa Group, suggesting that the Middle Pleistocene sediments corresponding to MIS 7e is distributed in shallow subsurface at this area.