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 101 631 A 015 Extended Core Barrel 01 048 048 VAC Vacutainer sampling GC1-50 0000080 0000009 0000001 0000008.89 0000008.00 23.58667 -75.74267 0138.40 13887 13887