Figure F6. delta15N-delta13C diagram of sediments from Site 1040, including data for Sites 1254 and 1255. The distribution of Site 1040 data shows deflecting trend from the mixing line between terrestrial and marine organic components proposed by Minoura et al. (1997). Both diagenetic alteration similar to that of Site 1149 (Sadofsky and Bebout, 2004) and a 13C-depleted terrestrial source may have contributed to this deflection. VPDB = Vienna Peedee belemnite.

Figure F6.

¹⁵N-

¹³C diagram of sediments from Site 1040, including data for Sites 1254 and 1255. The distribution of Site 1040 data shows deflecting trend from the mixing line between terrestrial and marine organic components proposed by Minoura et al. (1997). Both diagenetic alteration similar to that of Site 1149 (Sadofsky and Bebout, 2004) and a ¹³C-depleted terrestrial source may have contributed to this deflection. VPDB = Vienna Peedee belemnite.