Table 14. Molecular composition of headspace gases.					
					
"Notes: C1, C2, and C3 represent methane, ethane, and propane, respectively. ppmv = parts per million by volume. ND = not determined."					

"Core, section, interval (cm)"	Depth (mbsf)	C1 (ppmv)	C2 (ppmv)	C3 (ppmv)	C1/C2
					
					
"1H-5, 0-5"	6.03	19	1	1	19
"2H-4, 0-5"	11.93	35	1	0	35
"3X-3, 0-5"	17.33	3549	1	1	3549
"4X-1, 0-5"	23.43	294	0	0	ND
"5X-1, 0-5"	32.43	3	0	0	ND
"6X-2, 0-5"	36.93	1456	0	0	ND
"7X-5, 0-5"	47.53	1939	0	0	ND
"8X-5, 0-5"	56.63	56310	7	0	8044
"9X-5, 0-5"	65.63	1033	0	0	ND
"10X-5, 0-5"	71.63	230345	69	1	3338
"11X-3, 0-5"	81.23	82119	23	0	3570
"12X-3, 0-5"	90.23	64484	17	0	3793
"13X-1, 145-150"	98.98	3950	1	0	3950
"14X-2, 0-5"	108.63	7368	1	0	7368
"15X-5, 0-5"	122.73	20593	2	0	10297
"16X-4, 0-5"	129.43	5107	0	0	ND
"17X-1, 145-150"	137.38	18141	3	2	6047
"18X-3, 0-5"	148.53	23959	6	3	3993
					
"1R-3, 0-5"	158.03	8269	2		4135
"2R-2, 145-150"	167.58	39805	5	3	7961
"3R-5, 0-5"	180.23	49632	8	5	6204
"4R-5, 0-5"	189.83	111891	46	8	2432
"5R-2, 115-120"	196.18	73878	18	8	4104
"6R-2, 0-5"	204.63	26218	12	5	2185
"7R-5, 0-5"	218.73	59793	60	2	997
"8R-1, 0-5"	222.33	93904	54	5	1739
"9R-3, 0-5"	234.93	221442	264	1	839
"10R-3, 0-5"	244.63	60434	58	13	1042
"11R-3, 0-5"	254.23	144307	137	8	1053
"12R-2, 0-5"	262.43	119560	143	6	836
"13R-2, 0-5"	272.03	80187	61	6	1315
"14R-2, 0-5"	283.23	261578	267	13	980
"16R-3, 0-5"	303.53	343465	235	14	1462
"17R-3, 0-5"	312.23	164334	117	9	1405
"18R-1, 145-150"	320.28	73741	102	5	723
"19R-3, 0-5"	331.43	18389	23	0	800
"20R-4, 0-5"	343.98	75976	145	2	524
"21R-2, 0-5"	349.16	78465	129	2	608
"22R-2, 0-5"	358.73	246436	307	5	803
"23R-2, 0-5"	368.35	60765	69	4	881
"24R-2, 0-5"	377.93	97892	100	4	979
					
					
170-1041C					
"1R-1, 145-150"	395	71080	83	5	856
"2R-2, 0-5"	404.7	26398	65	5	406
"3R-2, 0-5"	414.2	10474	21	1	499