Core Depth (cm) Approx. age (Zn/Si)opal (umol/mol) (ky) KC081 0 5-10 0.73 (0.04) 35 10-15 0.86 (0.05) 55 10-15 1.42 (0.08) 85 15-20 0.85 (0.05) 105 15-20 0.86 (0.05) 135 20-25 0.04 (0.01) 135 20-25 0.38 (0.05) 159 20-25 0.73 (0.03) 159 20-25 1.32 (0.09) 170 20-25 1.62 (0.17) PC034 0 0-5 2.39 (0.15) 11 0-5 3.86 (0.29) 40 0-5 3.36 (0.19) 80 5-10 4.22 (0.49) 120 10-15 4.09 (0.14) 162 15-20 3.36 (0.15) 193 15-20 3.33 (0.18) 202 20-25 1.53 (0.06) 202 20-25 0.98 (0.04) RC13-252a 2.5 0-5 3.4 9.5 0-5 2.9 19.5 5-10 2.5 29.5 10-15 2 41.5 15-20 1.9 49.5 20-25 2.9 60.5 20-25 2.6 69.5 25-30 2.2 AII107-22GGCa 0 0-5 3.3 10 0-5 2.7 20 5-10 1.9 30 5-10 4.1 40 10-15 3.6 50 10-15 3.4 60 15-20 2.7 70 20-25 1.6 80 20-25 1.7 90 25-30 2 100 25-30 3.3 RC13-259a 10 0-5 3.4 20 0-5 3.4 40 0-5 3.4 60 5-10 4.8 81.5 5-10 4.8 100.5 10-15 5 123.2 10-15 5.4 143.5 10-15 4.4 162.5 15-20 3.2 181.5 20-25 5.1 200.5 25-30 2.7 220.5 >30 4.5