Fig. 9
From: New parameter of roundness R: circularity corrected by aspect ratio

Location of the study area. a Large-scale map of study area in Northeastern Japan and facing the Pacific Ocean. b Detailed map with sampling location in the Masaki area of Iwate Prefecture, Northeastern Japan. Location map is based on “Taro,” the 1:25,000 topographic map from the Geographical Survey Institute (GSI) of Japan. Solid circle and solid square indicate beach and slope deposits, respectively