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Table 3 Characteristics of event deposits in the KYD-trench

From: Historical and paleo-tsunami deposits during the last 4000 years and their correlations with historical tsunami events in Koyadori on the Sanriku Coast, northeastern Japan

Event deposits General thickness Comparison of grain size among event deposits General grain size Measured thickness [cm] Upper contact Basal contact Gravel content [wt%] Roundness (well-rounded + rounded) [%]
E1 Medium Coarse Upper: granule to medium sand, Lower: pebble to coarse sand 3–20 Sharp 10–28 45–66
E2 Thin Medium Granule to coarse sand 1–8 Disturbed Sharp 8–19 13–53
E3 Thick Coarse Granule to coarse sand 2–38 Sharp Sharp 11–55 48–86
E4 Medium Fine Granule to fine sand 3–16 Disturbed Sharp 2–18 32–41
E5 Medium Medium Granule to coarse sand 2–13 Disturbed Sharp 7–24 30–56
E6 Thick Medium Granule to coarse sand 1–24 Sharp Sharp 18–35 16–62
E7 Thick Medium Granule to coarse sand 2–28 Disturbed/sharp Sharp 2–31 26–67
E8 Thin Fine Coarse to medium sand 1–7 Disturbed Disturbed 8–10 16–45
E9 Thin Fine Granule to medium sand 2–18 Disturbed Disturbed/sharp 8–17 12–42
E10 Thin Fine Coarse to medium sand 1–9 Disturbed Disturbed 3–11 14–43
E11 Medium Fine Coarse to medium sand 2–13 Disturbed Disturbed 3–4 50–61