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Fig. 8 | Progress in Earth and Planetary Science

Fig. 8

From: Basin-wide erosion and segmentation of the Plio-Pleistocene forearc basin in central Japan revealed by tephro- and biostratigraphy

Fig. 8

Outcrops of the angular unconformity a, b, d and channel fill deposits c, e in the Kurotaki Formation, which are dated between 2.8–2.5 and 2.5–2.0 Ma, younger than the major erosional event. a Angular unconformity exposed in the quarry cliff at Loc. K3. b Angular unconformity exposed in the sea cliff. c Channel fill deposits of conglomerate of the Kurotaki Formation overlying the Kiyosumi Formation at Loc. K4. d Close-up photograph of a. The angular unconformity is covered by a thin, volcaniclastic-rich fine-grained sand bed, which is laterally obscured due to bioturbation. A burrow cutting the underlying strata can be observed. e Close-up photograph of basal conglomerate of the channel fill deposits. Yellow dashed lines in a and b indicate the bedding plane. The white arrows in a, b, and d indicate the angular unconformity. Red arrows in c and e indicate the erosional surface underlying the channel-fill deposits

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