% depth %TOC arcC arcd13C dageC daged13C 493.5 0.82 2.0 nm 16.7 -41 504.5 0.76 2.7 nm 17.1 -43 512 0.76 2.5 nm 16.0 -42 518 0.77 2.0 nm 19.9 -42 526 0.73 0.4 nm 28.8 -40 533 0.73 nd - 28.7 -40 542 0.70 47.2 -72.0 69.5 -54 550 0.66 5.1 nm 22.5 -52 557 0.67 41.5 -76.1 118.3 -60 566 0.64 20.4 -74.0 4.3 -48 572 0.64 8.4 nm 50.0 -40 598 0.66 4.4 nm 17.8 nm 614 0.64 nd - nd - 622 0.69 2.8 nm 15.0 nm 630 0.68 nd - 43.8 -44 638 0.78 nd - 44.1 -43 646 0.70 nd - 46.7 -41 654 0.59 nd - 46.7 -43 670 0.66 3.0 nm 29.9 nm 702 0.53 11.1 -71.5 49.3 -37 718 0.57 3.3 nm 30.6 nm