Fig. 1
From: Amber in the Cretaceous deep sea deposits reveals large-scale tsunamis
Locality and stratigraphic distribution of amber-concentrated beds in the Shimonakagawa Quarry, Nakagawa area, Hokkaido, northern Japan. a, b Locality map. Early Cretaceous paleomap is modified from9. c Stratigraphic scheme and a general trend of depositional settings of the Cretaceous siliciclastic sequence in the Nakagawa area, modified from9. Bar.–Barremian. Ceno.–Cenomanian. C.–Coniacian. S.–Santonian. d Columnar sections in the west, south, and east portions of the quarry (Supplementary Fig. S1). The horizons of amber high-concentrated beds, tuff layers used for zircon U-Pb dating and large driftwood are shown with each bed number.
