Table AT1. Total organic carbon concentrations and isotope compositions of sediments decalcified with varying HCl concentrations.

Table AT1. Total organic carbon concentrations and isotope compositions of sediments decalcified with varying HCl concentrations.


Core, section, interval (cm)	HCl concentration (N)	TOC (wt%)	¹³C_VPDB ()
170-1040C-
1R-2, 117–119	0.5	1.34	–22.6
	2	1.35	–22.6
	6	1.36	–22.7
5R-4, 112–114	0.5	1.53	–25.6
	2	1.61	–25.4
	6	1.53	–25.6
18R-2, 112–115	0.5	1.32	–23.7
	2	1.33	–23.7
	6	1.29	–23.7
19R-2, 112–115	0.5	1.31	–25.2
	2	1.35	–25.1
	6	1.32	–25
205-1254A-
6R-1, 121–162	0.5	2	–24.3
	2	1.89	–24.3
	6	1.92	–24.5
12R-1, 101–141	0.5	1.22	–26.5
	2	1.19	–26.8
	6	1.18	–26.6
13R-3, 100–145	0.5	1.27	–25.6
	2	1.22	–25.7
	6	1.25	–25.9

Notes: All samples used for comparisons were either frozen onboard immediately upon recovery (Leg 205) or stored refrigerated for a prolonged period (Leg 170) at ODP Gulf Coast Core Repository (College Station, Texas). TOC = total organic carbon, VPDB = Vienna Peedee belemnite.