Figure F2. Depth profiles of 129I/I ratio and sediment porosity obtained from logging while drilling (Kinoshita et al., 2008). Red and blue dashed lines = lithologic boundary between overlying Kumano forearc basin sediment and underlying accreted sediments at Sites C0001 and C0002, respectively (Ashi et al., 2008), arrow = seawater value for 129I/I of 1500 × 10–15 (Fehn et al., 2007). Ages are calculated from the measured 129I/I ratio with the standard decay equation of 129I (Equation 1).
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