Table 10. Methane concentrations from the four uppermost cores.		

"Core, section, interval (cm)"	Depth (mbsf)	CH4 (uM)

164-994A-		
"1H-1, 140-150"	1.4	
"1H-2, 140-150"	2.9	1
"1H-3, 140-150"	4.4	
"1H-4, 140-150"	5.9	
"1H-5, 140-150"	7.4	
"2H-1, 140-150"	9.3	
"2H-2, 115-130"	10.55	2
"2H-2, 140-150"	10.8	
"2H-3, 115-130"	12.05	2
"2H-3, 140-150"	12.3	
"2H-4, 115-130"	13.55	18
"2H-4, 140-150"	13.8	1
"2H-5, 115-130"	15.05	15
"2H-5, 140-150"	15.3	7
"2H-6, 115-130"	16.55	22
"2H-6, 140-150"	16.8	
"3H-1, 10-25"	17.5	11
"3H-1, 85-110"	18.25	19
"3H-1, 140-150"	18.8	11
"3H-2, 10-25"	19	5
"3H-2, 45-60"	19.35	12
3H-2 80-95	19.7	
"3H-2, 115-130"	20.05	12
"3H-2, 140-150"	20.3	12
"3H-3, 10-25"	20.5	38
"3H-3, 45-60"	20.85	80
"3H-3, 80-95"	21.2	124
"3H-3, 115-130"	21.55	170
"3H-3, 140-150"	21.8	53
"3H-4, 10-25"	22	33
"3H-4, 45-60"	22.35	185
"3H-4, 80-95"	22.7	261
"3H-4, 115-130"	23.05	298
"3H-4, 140-150"	23.3	1
"3H-5, 10-25"	23.5	314
"3H-5, 45-60"	23.85	311
"3H-5, 80-95"	24.2	849
"3H-5, 115-130"	24.55	469
"3H-5, 140-150"	24.8	57
"3H-6, 10-25"	25	439
"3H-6, 45-60"	25.35	532
"3H-6, 80-95"	25.7	608
"3H-6, 115-130"	26.05	580
"3H-6, 140-150"	26.3	
"3H-7, 140-150"	27.6	806
"4H-2, 10-25"	27.6	184
"4H-2, 140-150"	28.89	668

"Note: The dense sampling scheme was designed to delineate the base of the sulfate reduction zone, which occurred at ~20.4 m."