% depth %TOC arcC arcd13C dageC daged13C 262 0.56 nd - 23.2 -45 270 0.60 5.8 nm 40.5 nm 278 0.61 nd - 18.0 -47 286 0.54 nd - 39.9 -47 294 0.43 nd - 36.2 -50 302 0.45 nd - 43.1 -48 310 0.49 nd - 77.6 -51 318 0.58 nd - 22.3 -43 326 0.55 nd - 34.2 -45 334 0.52 nd - 37.8 -44 342 0.58 4.1 nm 48.6 nm 374 0.54 nd - 5.6 nm 382 0.53 7.9 nm 33.4 nm 406 0.54 7.5 nm 56.5 -38 430 0.45 5.7 nm 78.3 -40 462 0.49 4.5 nm 65.8 nm 502 0.53 12.2 nm 82.9 nm