Facies analysis of subsurface sediments of the Osaka, Kyoto and Kameoka Basins using boring database system

Abstract

Reveals that the fluctuations in the appearance percentage of clay in the Osaka basin occur with a frequency very similar to the fluctuations of oxygen-isotope ratio in the upper part of core V28-239 raised from the Solomon Rise at lat 3°15′N, long 159°11′E from a depth of 3490 m. Spectral analysis reveals that the appearance percentage of clay and sand in the Osaka basin each have a pre-eminent period of about 30 m, while gravels in the northern part of the Kyoto basin and the Kameoka basin have a 12~13 m period in common. -from English summary