Drilling investigation for Matsushima giant landslide hypothesis
Japan Society for the Promotion of Science:Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
Date (from‐to) : 2014/04 -2017/03
Author : Hasegawa Shuichi; ITO Hisatoshi; SUGAWARA Hiroki
A core drilling was performed at Matsushima, Miyagi Prefecture, where a large landslide was supposed to happen, creating picturesque small islands in the Matsushima Bay. Zircon U-Pb dating was performed at three points, namely, upper block of the supposed landslide, the supposed landslide plane, and lower block of the supposed landslide, using tuffs and tuffaceous sandstone. All of them yielded ~15 Ma, which indicates there is no geochronological evidence for the supposed landslide.