Fig. 4
From: Three thousand year paleo-tsunami history of the southern part of the Japan Trench
Columnar section of KBT4 core: a close-up photograph at 154–254 cm depth, CT images, columnar section, grain size, and sand content are also shown. E1, E2, and E3 denote event sand layers. In the CT image, white parts denote sand layers with higher density, whereas gray parts denote mud or peat. White parts represent the apparent direct top of the sand layer (green arrowheads show) in the CT image, indicating that sands were contaminated into the mud layer. For the grain size diagram, the horizontal axis is grain size (phi). The volume percent (%) of each grain size is indicated by the color scale