Stratigraphy of Tokyo Formation: re-examination of Kita-Ku Central Park core

Tomonori Naya; Kentaro Sakata; Tsutomu Nakazawa; Takehiko Suzuki; Toshio Nakayama

Presentation information

[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.