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 68 503 1 CC 3.0 3.0 0.00 4.73 5.0 0.3 39.0 LECO WR-12 ANALYZER (total and/or organic) DSDP SHORE LABORATORY