leg site hole core section top interval depth (cm) bottom interval depth (cm) top of core depth (m) sample depth (m) percent total carbon percent organic carbon percent calcium carbonate (CaCO3) method code data source code 24 231 2 2 72.0 72.0 0.50 2.72 6.8 0.7 50.8 LECO ACID-BASE ANALYZER (total and/or organic) DSDP SHORE LABORATORY 24 231 31 4 0.0 0.0 273.00 277.50 8.3 0.9 61.6 LECO ACID-BASE ANALYZER (total and/or organic) DSDP SHORE LABORATORY 24 231 61 6 81.0 81.0 557.00 565.31 4.3 0.3 33.3 LECO ACID-BASE ANALYZER (total and/or organic) DSDP SHORE LABORATORY