leg site hole core coretype section top interval bottom interval sample code head or vacutainer volume parameter id las name oxygen nitrogen methane carbon monoxide carbon dioxide ethylene ethane hydrogen sulfied propylene propane isobutate normal butane isopentane normal pentane isohexane normal hexane methane/ethane methane/ethane plus comments latitude longitude depth top interval depth below sea floor bottom interval depth below sea floor 101 627 B 059 Extended Core Barrel 01 010 010 VAC Vacutainer sampling GC1-50 0000115 0000007 0000016 0000014 0000004 0000016.43 0000002.80 27.63500 -78.29417 0530.60 53069 53069