40 m sediment 1600/400 Attn. 0.15/0.4 C Z 3 0 1500 0 0 0 1 0 0 1600 400 0.15 0.4 1.8 0 40 1800 600 0. 0. 2.0 0 10 160 81 0 0 90 181 0 0 90 20 30 10 160 3 1 1 10 1 0 2000 12 500 -100 100 12 50