Table 12. 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

170-1040B					
"1H-2, 0-5"	1.53	3	0	0	ND
"2H-5, 0-5"	11.53	3	0	0	ND
"5X-2, 0-5"	28.53	8996	33	2	273
"6X-2, 0-5"	37.93	13779	62	3	222
"7X-1, 0-5"	45.83	43884	209	6	210
"8X-1, 0-5"	55.23	25970	92	2	282
"9X-5, 0-5"	70.83	15540	56	0	278
10X2 0-5	75.93	31933	78	1	409
"11X-5, 0-5"	90.03	8339	73	0	114
"12X-2, 0-5"	95.13	36432	90	2	405
"13X-5, 0-5"	105.13	21384	39	0	548
"14X-3, 0-5"	105.33	5395	10	0	540
"15X-5, 0-5"	115.07	8992	7	0	1285
"16X-2, 0-5"	124.43	21060	17	1	1239
"17X-2, 0-5"	134.03	44529	25	2	1781
"18X-3, 0-5"	143.73	7742	15	0	516
"19X-5, 0-5"	153.33	20399	23	1	887
"20X-5, 0-5"	167.43	15678	14	0	1120
"21X-4, 0-5"	174.03	10926	9	0	1214
"22X-4, 0-5"	185.13	25997	11	2	2363

170-1040C					
"1R-5, 0-5"	165.33	15727	11	3	1430
"2R-2, 0-5"	170.33	11251	5	0	2250
"3R-4, 0-5"	183.93	17266	15	13	1151
"4R-3, 0-5"	191.03	87043	65	24	1339
"5R-5, 0-5"	203.63	35431	46	24	770
"6R-4, 0-5"	211.83	16619	17	11	978
"7R-4, 0-5"	221.43	9527	18	14	529
"8R-2, 0-5"	228.03	74653	49	6	1524
"9R-5, 0-5"	242.13	9097	10	13	910
"10R-5, 0-5"	251.83	4818	5	8	964
"11R-5, 0-5"	261.43	5711	5	4	1142
"12R-4, 0-5"	269.63	7510	10	12	751
"13R-5, 0-5"	280.73	50886	23	5	2212
"15R-5, 0-5"	300.13	10936	7	4	1562
"16R-2, 0-5"	305.23	5127	5	4	1025
"17R-2, 0-5"	314.83	7434	7	5	1062
"18R-2, 0-5"	324.53	116556	78	13	1494
"19R-2,0-5"	334.13	81593	61	14	1338
"20R-5, 0-5"	348.23	12724	15	19	848
"21R-5, 0-5"	357.83	8767	10	17	877
22R5 0-5	367.43	15730	11	1	1430
"23R-3, 0-5"	374.03	41065	32	1	1283
"24R-2, 0-5"	382.13	20466	11	1	1861
"25R-5, 0-5"	396.23	11064	9	1	1229
"26R-2, 0-5"	401.33	6842	6	0	1140
"27R-4, 0-5"	413.93	6644	6	0	1107
"28R-3, 0-5"	422.13	4	0	1	ND
"29R-2, 0-5"	430.13	399	10	0	40
"30R-5, 0-5"	444.23	46	0	0	ND
"31R-3, 0-5"	450.83	169	1	0	169
"32R-4, 0-5"	461.93	14	0	0	ND
"33R-5, 0-5"	473.03	5	0	0	ND
"34R-4, 0-5"	481.23	5	0	1	ND
"35R-2, 0-5"	487.93	4	0	1	ND
"36R-3, 0-5"	499.03	4	0	0	ND
"37R-4, 0-5"	508.63	5	0	1	ND
"38R-3, 0-5"	518.33	6	0	0	ND
"39R-3, 0-5"	527.93	5	0	1	ND
"40R-5, 0-5"	540.53	4	0	0	ND
"41R-5, 0-5"	550.13	6	0	1	ND
"42R-5, 0-5"	559.13	6	0	0	ND
"43R-3, 0-5"	566.43	6	0	0	ND
"44R-3, 0-5"	576.13	6	0	0	ND
"45R-3, 0-5"	585.73	5	0	0	ND
"46R-3, 0-5"	595.33	5	0	0	ND
"47R-3, 0-5"	604.93	6	0	1	ND
"48R-5, 0-5"	617.63	5	0	1	ND
"49R-5, 0-5"	627.23	3	0	1	ND
"50R-2, 0-5"	632.33	4	0	0	ND
"51R-2, 0-5"	641.93	4	0	1	ND