TABLE 1.

Sample locations and characteristics^a

Site	Location	Seafloor depth (m)	Below seafloor depth (m)	Depositional conditions	Cl−-based salinity	Total carbon (wt%)	Total organic carbon (wt%)	Concn
								Methane (mM)	Sulfate (mM)	Formate (μM)	Acetate (μM)	Propionate (μM)	Butyrate (μM)
59E Little Belt	55°0.285′N, 10°6.499′E	37.1	0.25	Holocene marine	23.30	6.40	5.40		0.25	1.61	3.95	0.96	0.17
			15	Holocene marine	24.23	5.95	4.97	1.13	0.07	10.38	20.54	4	0.43
			67	Glacial lacustrine	7.48	2.17	0.91	1.76	0.01	0.74	24.04	6.61	1.04
60B Kattegat	56°37.204′N, 11°40.229′E	31.2	24	Marginal marine	31.72	2.08	0.48	0.00	6.59	2.73	11.85	4.19	0.42
			37	Marginal marine	30.67	3.21	0.55	0.00	14.45	2.73	11.85	4.19	0.42
63E Landsort Deep	58°37.330′N, 18°15.240′E	437.1	11	Holocene marine	12.03	1.76	1.53	2.33	0.01	0.00	37.38	3.03	0.2
			47	Glacial lacustrine	1.67	0.70	0.55	9.40	0.02	0.38	22.73	4.71	0.14
65C Børnholm Basin	55°28.084′N, 15°28.624′E	84.3	0.25	Holocene marine	15	5	4.99	0.19	2.3	2.92	1.80	1.05	0
			3	Holocene marine	15.52	4.16	3.67	10.10	0.03	2.55	34.90	3.66	0
			10	Holocene lacustrine/marine transition	12.84	0.88	0.97	9.30	0.07	2.32	19.50	2.01	0.12
			30	Glacial lacustrine	2.78	2.48	0.48	0.80	0.22	0.00	22.80	2.46	0.25

^aLocation data, depositional conditions, salinity, total carbon, total inorganic carbon, alkalinity, methane, and sulfate data were originally published as part of the IODP Expedition 347 post-cruise report and by Andrén et al. (38), except for data for sample M65C-0.25m, which was published by Beulig et al. (39). Formate, acetate, propionate, and butyrate concentrations were measured in this publication, as detailed in Materials and Methods.