Fig. 1From: Spatial and temporal variations in depositional systems in the Kazusa Group: insights into the origins of deep-water massive sandstones in a Pleistocene forearc basin on the Boso Peninsula, JapanGeologic sketch map of the Boso Peninsula and the adjacent area. Modified from Ito et al. (2016). The inset map shows the present-day plate-tectonic framework of the Boso Peninsula and its adjacent area (modified from Ito 2019). SRFD in the inset map denotes the location of the modern Sakawa River fan deltaBack to article page