Sample: C-52 MU J=0.0039699 T t 40(mol) 40/39 38/39 37/39 36/39 K/Ca · 39Ar 40Ar* Age (Ma) ± 650 10 2.7e-14 31.5952 1.9e-3 0.1585 0.0494 3.1 0.00997 0.538 117.7 ± 1.3 730 10 3.9e-14 20.8071 0.0e+0 0.0076 0.0065 64 0.03230 0.908 130.5 ± 0.5 780 10 6.4e-14 20.5050 0.0e+0 0.0058 0.0052 84 0.06947 0.924 130.9 ± 0.4 780 15 6.5e-14 20.9300 0.0e+0 0.0028 0.0068 177 0.10611 0.904 130.6 ± 0.4 780 20 7.1e-14 19.8763 0.0e+0 <0 0.0030 b.d. 0.14834 0.955 131.1 ± 0.4 780 30 1.1e-13 20.0374 0.0e+0 0.0018 0.0030 274 0.21426 0.955 132.1 ± 0.3 780 50 1.7e-13 20.1039 0.0e+0 <0 0.0024 b.d. 0.31307 0.964 133.7 ± 0.3 780 70 2.0e-13 20.2423 0.0e+0 0.0034 0.0021 145 0.42997 0.969 135.2 ± 0.3 780 90 2.1e-13 20.4564 0.0e+0 0.0022 0.0019 224 0.54960 0.973 137.2 ± 0.3 805 5 3.3e-14 20.3804 0.0e+0 <0 0.0018 b.d. 0.56871 0.973 136.8 ± 0.5 805 10 5.2e-14 20.4024 0.0e+0 0.0012 0.0019 413 0.59919 0.973 136.9 ± 0.4 805 15 6.6e-14 20.4329 0.0e+0 <0 0.0019 b.d. 0.63740 0.972 136.9 ± 0.4 805 20 7.0e-14 20.2914 0.0e+0 0.0053 0.0019 93 0.67825 0.972 136.0 ± 0.4 805 30 7.5e-14 20.1535 0.0e+0 <0 0.0017 b.d. 0.72267 0.975 135.6 ± 0.3 805 50 8.2e-14 19.8875 0.0e+0 <0 0.0020 b.d. 0.77163 0.970 133.1 ± 0.3 805 70 6.8e-14 19.3642 0.0e+0 0.0007 0.0018 714 0.81328 0.973 130.1 ± 0.4 860 3 2.2e-14 17.0104 0.0e+0 <0 0.0017 b.d. 0.82873 0.971 114.5 ± 0.5 825 10 2.1e-14 18.1266 0.0e+0 <0 0.0019 b.d. 0.84267 0.969 121.6 ± 0.6 825 15 2.0e-14 18.1274 0.0e+0 <0 0.0015 b.d. 0.85601 0.976 122.5 ± 0.6 825 25 2.3e-14 17.9723 0.0e+0 <0 0.0017 b.d. 0.87106 0.972 121.0 ± 0.5 825 40 2.5e-14 17.8573 0.0e+0 0.0083 0.0014 59 0.88763 0.977 120.8 ± 0.5 825 60 2.5e-14 17.8766 0.0e+0 0.0076 0.0015 65 0.90414 0.975 120.7 ± 0.5 880 10 1.3e-14 18.0266 0.0e+0 0.0252 0.0018 19 0.91276 0.970 121.0 ± 0.8 920 10 2.6e-14 17.0460 0.0e+0 0.0469 0.0019 10 0.93067 0.967 114.4 ± 0.5 920 20 2.4e-14 16.4940 0.0e+0 0.0035 0.0019 139 0.94766 0.965 110.6 ± 0.5 920 40 2.7e-14 17.5615 0.0e+0 0.0034 0.0015 145 0.96586 0.975 118.6 ± 0.5 1000 10 1.4e-14 18.0576 0.0e+0 0.0344 0.0018 14 0.97524 0.971 121.4 ± 0.7 1100 10 1.1e-14 19.6195 0.0e+0 0.1690 0.0044 2.9 0.98161 0.934 126.7 ± 1.1 1250 10 3.2e-14 20.7550 0.0e+0 0.0564 0.0034 8.7 1.00000 0.951 136.1 ± 0.5 Total fusion age, TFA= 131.45 ± 0.26 Ma (including J) t = dwell time in minutes. 40(mol) = moles corrected for blank and reactor-produced 40. Ratios are corrected for blanks, decay, and interference. ·39Ar is cumulative, 40Ar* = rad fraction. Sample: C-52#2 MU J=0.0039992 T t 40(mol) 40/39 38/39 37/39 36/39 K/Ca · 39Ar 40Ar* Age (Ma) ± 600 10 2.7e-14 36.5345 3.1e-3 0.3567 0.0789 1.4 0.00659 0.362 92.9 ± 1.8 650 10 1.7e-14 21.6641 8.5e-4 0.0412 0.0159 12 0.01357 0.783 118.4 ± 1.0 700 10 2.9e-14 19.8699 1.2e-3 0.0065 0.0085 76 0.02655 0.874 121.2 ± 0.7 750 10 5.1e-14 18.5912 0.0e+0 0.0091 0.0043 54 0.05064 0.931 120.7 ± 0.4 775 10 6.9e-14 18.9522 0.0e+0 0.0072 0.0049 68 0.08273 0.924 122.1 ± 0.4 790 10 8.9e-14 19.9817 0.0e+0 0.0061 0.0072 80 0.12160 0.893 124.3 ± 0.4 796 10 1.2e-13 20.1711 0.0e+0 0.0038 0.0073 128 0.17293 0.893 125.4 ± 0.3 800 10 1.5e-13 19.6876 0.0e+0 0.0017 0.0041 295 0.23989 0.938 128.6 ± 0.3 802 10 1.4e-13 19.5157 0.0e+0 0.0016 0.0028 301 0.30406 0.958 130.1 ± 0.3 804 10 1.4e-13 19.5348 0.0e+0 0.0010 0.0024 479 0.36668 0.963 130.9 ± 0.3 806 10 1.3e-13 19.6454 0.0e+0 0.0023 0.0024 211 0.42672 0.964 131.8 ± 0.3 808 10 1.2e-13 19.6922 0.0e+0 0.0009 0.0023 552 0.48219 0.966 132.2 ± 0.3 810 10 1.1e-13 19.6313 0.0e+0 0.0028 0.0024 174 0.53120 0.964 131.6 ± 0.3 812 10 9.3e-14 19.5407 0.0e+0 0.0023 0.0023 212 0.57279 0.965 131.2 ± 0.3 814 10 7.8e-14 19.3562 0.0e+0 <0 0.0024 b.d. 0.60820 0.963 129.7 ± 0.3 816 10 6.4e-14 19.1801 0.0e+0 0.0011 0.0025 458 0.63742 0.961 128.3 ± 0.4 818 10 5.4e-14 18.9083 0.0e+0 <0 0.0025 b.d. 0.66247 0.961 126.5 ± 0.4 820 10 4.6e-14 18.7461 0.0e+0 <0 0.0024 b.d. 0.68413 0.963 125.7 ± 0.4 823 10 4.1e-14 18.5906 0.0e+0 0.0031 0.0026 158 0.70331 0.959 124.3 ± 0.4 826 10 3.7e-14 18.3166 0.0e+0 0.0026 0.0027 187 0.72099 0.956 122.1 ± 0.4 829 10 3.2e-14 18.1541 0.0e+0 <0 0.0025 b.d. 0.73648 0.959 121.4 ± 0.5 832 10 2.9e-14 18.0438 0.0e+0 <0 0.0024 b.d. 0.75053 0.960 120.9 ± 0.5 835 10 2.7e-14 17.8845 0.0e+0 0.0066 0.0025 74 0.76361 0.958 119.6 ± 0.5 840 10 2.5e-14 17.7113 0.0e+0 <0 0.0026 b.d. 0.77609 0.957 118.3 ± 0.5 850 10 2.8e-14 17.6132 0.0e+0 <0 0.0023 b.d. 0.79014 0.961 118.1 ± 0.5 865 10 3.5e-14 17.5658 0.0e+0 <0 0.0024 b.d. 0.80750 0.960 117.7 ± 0.4 880 10 4.2e-14 17.5012 0.0e+0 0.0059 0.0024 83 0.82859 0.959 117.2 ± 0.4 900 10 4.6e-14 16.7458 0.0e+0 0.0142 0.0023 34 0.85257 0.959 112.3 ± 0.3 930 10 5.5e-14 15.2968 0.0e+0 0.0297 0.0020 16 0.88413 0.962 103.1 ± 0.3 960 10 5.6e-14 15.8513 0.0e+0 0.0151 0.0019 32 0.91518 0.964 107.0 ± 0.3 990 10 4.2e-14 17.0454 0.0e+0 0.0114 0.0016 43 0.93692 0.971 115.7 ± 0.4 1030 10 3.2e-14 17.7464 0.0e+0 0.0210 0.0018 23 0.95253 0.971 120.2 ± 0.4 1100 10 2.5e-14 17.9469 0.0e+0 0.1073 0.0021 4.6 0.96456 0.965 120.8 ± 0.5 1250 10 7.6e-14 18.7382 0.0e+0 0.0870 0.0016 5.6 1.00000 0.974 127.1 ± 0.3 Total fusion age, TFA= 124.62 ± 0.25 Ma (including J) t = dwell time in minutes. 40(mol) = moles corrected for blank and reactor-produced 40. Ratios are corrected for blanks, decay, and interference. ·39Ar is cumulative, 40Ar* = rad fraction. Sample: C-60 MU J=0.0040022 T t 40(mol) 40/39 38/39 37/39 36/39 K/Ca · 39Ar 40Ar* Age (Ma) ± 600 10 2.4e-14 29.4712 2.0e-3 0.0479 0.0509 10 0.00438 0.490 101.3 ± 1.4 650 10 2.4e-14 20.3955 3.6e-4 <0 0.0167 b.d. 0.01055 0.758 108.4 ± 0.8 700 10 4.0e-14 17.8268 0.0e+0 0.0025 0.0080 197 0.02232 0.868 108.4 ± 0.4 750 10 7.1e-14 17.1826 0.0e+0 0.0072 0.0059 68 0.04414 0.899 108.2 ± 0.3 775 10 9.3e-14 16.5550 0.0e+0 0.0041 0.0039 119 0.07380 0.930 107.9 ± 0.3 790 10 2.0e-13 17.5175 0.0e+0 0.0005 0.0061 992 0.13520 0.896 109.9 ± 0.3 796 10 3.4e-13 16.4500 0.0e+0 <0 0.0029 b.d. 0.24419 0.948 109.3 ± 0.2 796 20 4.6e-13 16.1837 0.0e+0 <0 0.0018 b.d. 0.39527 0.966 109.5 ± 0.2 796 10 1.9e-13 16.1463 0.0e+0 0.0013 0.0014 382 0.45642 0.974 110.1 ± 0.2 797 10 1.7e-13 16.3471 0.0e+0 0.0014 0.0014 344 0.51187 0.974 111.4 ± 0.2 798 10 1.5e-13 16.5106 0.0e+0 0.0022 0.0015 226 0.56089 0.973 112.5 ± 0.3 799 10 1.3e-13 16.6287 0.0e+0 <0 0.0015 b.d. 0.60335 0.974 113.3 ± 0.3 800 10 1.2e-13 16.7529 0.0e+0 <0 0.0015 b.d. 0.63990 0.974 114.1 ± 0.3 800 20 1.5e-13 16.8213 0.0e+0 <0 0.0016 b.d. 0.68819 0.971 114.2 ± 0.3 800 40 1.7e-13 16.9245 0.0e+0 <0 0.0018 b.d. 0.73986 0.969 114.7 ± 0.3 802 10 4.2e-14 16.8700 0.0e+0 0.0028 0.0017 175 0.75303 0.970 114.5 ± 0.4 804 10 3.8e-14 16.7651 0.0e+0 <0 0.0017 b.d. 0.76496 0.970 113.8 ± 0.4 806 10 3.5e-14 16.7986 0.0e+0 <0 0.0016 b.d. 0.77595 0.971 114.1 ± 0.4 808 10 3.2e-14 16.7400 0.0e+0 0.0014 0.0016 339 0.78603 0.973 113.9 ± 0.5 810 10 3.0e-14 16.8117 0.0e+0 0.0063 0.0017 78 0.79561 0.969 114.0 ± 0.5 812 10 2.8e-14 16.6645 0.0e+0 0.0038 0.0015 130 0.80457 0.973 113.4 ± 0.5 814 10 2.6e-14 16.6372 0.0e+0 <0 0.0018 b.d. 0.81284 0.968 112.7 ± 0.5 816 10 2.4e-14 16.5763 0.0e+0 <0 0.0016 b.d. 0.82060 0.972 112.8 ± 0.5 819 10 2.4e-14 16.4979 0.0e+0 0.0109 0.0017 45 0.82820 0.970 112.0 ± 0.6 822 10 2.3e-14 16.5026 0.0e+0 <0 0.0017 b.d. 0.83551 0.969 111.9 ± 0.6 825 10 2.2e-14 16.3693 0.0e+0 0.0079 0.0020 62 0.84247 0.964 110.5 ± 0.6 830 10 2.2e-14 16.4144 0.0e+0 <0 0.0018 b.d. 0.84949 0.968 111.2 ± 0.6 840 10 2.3e-14 16.2924 0.0e+0 <0 0.0019 b.d. 0.85699 0.965 110.1 ± 0.5 850 10 2.6e-14 16.3311 0.0e+0 0.0047 0.0018 105 0.86542 0.968 110.7 ± 0.5 865 10 3.4e-14 16.4400 0.0e+0 0.0047 0.0018 105 0.87628 0.967 111.3 ± 0.4 880 10 4.2e-14 16.4152 0.0e+0 0.0002 0.0017 2983 0.88992 0.969 111.3 ± 0.4 900 10 6.1e-14 16.5869 0.0e+0 0.0008 0.0016 579 0.90939 0.971 112.7 ± 0.3 930 10 7.4e-14 16.8786 0.0e+0 <0 0.0015 b.d. 0.93256 0.974 114.9 ± 0.3 960 10 5.1e-14 16.5654 0.0e+0 0.0089 0.0014 55 0.94884 0.975 113.0 ± 0.4 990 10 4.1e-14 16.2635 0.0e+0 0.0315 0.0015 16 0.96208 0.973 110.8 ± 0.4 1030 10 3.3e-14 16.1256 0.0e+0 0.8887 0.0013 0.55 0.97305 0.975 110.1 ± 0.4 1100 10 2.7e-14 16.5641 0.0e+0 0.1099 0.0017 4.5 0.98154 0.970 112.5 ± 0.5 1250 10 5.1e-14 14.5757 0.0e+0 0.0408 0.0009 12 1.00000 0.982 100.5 ± 0.3 Total fusion age, TFA= 111.07 ± 0.22 Ma (including J) t = dwell time in minutes. 40(mol) = moles corrected for blank and reactor-produced 40. Ratios are corrected for blanks, decay, and interference. ·39Ar is cumulative, 40Ar* = rad fraction. Sample: C-62 MU J=0.0039724 T t 40(mol) 40/39 38/39 37/39 36/39 K/Ca · 39Ar 40Ar* Age (Ma) ± 650 10 3.5e-14 22.7251 1.2e-3 0.1081 0.0347 4.5 0.01304 0.549 87.2 ± 0.9 730 10 4.1e-14 15.1122 0.0e+0 0.0022 0.0049 225 0.03599 0.905 95.4 ± 0.4 780 10 7.0e-14 15.7496 0.0e+0 0.0050 0.0075 97 0.07362 0.859 94.4 ± 0.3 780 15 7.4e-14 15.4960 0.0e+0 <0 0.0068 b.d. 0.11400 0.870 94.1 ± 0.3 780 20 1.0e-13 14.9255 0.0e+0 0.0037 0.0046 132 0.17161 0.908 94.6 ± 0.2 780 30 1.2e-13 14.2876 0.0e+0 0.0002 0.0027 3191 0.24098 0.945 94.3 ± 0.2 780 50 1.5e-13 14.2290 0.0e+0 0.0027 0.0026 185 0.33015 0.946 94.0 ± 0.2 780 70 1.6e-13 14.1712 0.0e+0 0.0013 0.0021 391 0.42539 0.956 94.6 ± 0.2 780 90 1.5e-13 14.1402 0.0e+0 0.0009 0.0018 522 0.51689 0.962 94.9 ± 0.2 810 5 3.6e-14 14.2367 0.0e+0 0.0003 0.0029 1699 0.53837 0.939 93.4 ± 0.3 810 10 5.1e-14 13.9230 0.0e+0 <0 0.0015 b.d. 0.56934 0.967 94.0 ± 0.3 810 15 6.2e-14 13.9227 0.0e+0 <0 0.0017 b.d. 0.60682 0.965 93.8 ± 0.3 810 20 6.5e-14 13.8963 0.0e+0 0.0035 0.0017 141 0.64627 0.964 93.5 ± 0.2 810 30 7.4e-14 13.8879 0.0e+0 <0 0.0017 b.d. 0.69091 0.964 93.5 ± 0.2 810 50 8.3e-14 13.9334 0.0e+0 0.0039 0.0017 126 0.74135 0.963 93.7 ± 0.2 810 70 7.4e-14 13.8648 0.0e+0 0.0012 0.0020 396 0.78612 0.958 92.7 ± 0.2 810 90 6.0e-14 13.6883 0.0e+0 0.0073 0.0015 67 0.82312 0.968 92.5 ± 0.3 820 10 7.7e-15 13.6957 0.0e+0 <0 0.0017 b.d. 0.82785 0.963 92.1 ± 0.9 820 15 9.9e-15 13.8222 0.0e+0 0.0149 0.0020 33 0.83391 0.956 92.3 ± 0.8 820 25 1.5e-14 13.6872 0.0e+0 0.0090 0.0016 55 0.84289 0.966 92.3 ± 0.6 820 40 2.0e-14 13.6340 0.0e+0 0.0147 0.0016 33 0.85505 0.964 91.8 ± 0.5 820 60 2.3e-14 13.6397 0.0e+0 0.0055 0.0014 89 0.86951 0.970 92.4 ± 0.4 840 10 6.2e-15 13.6629 0.0e+0 <0 0.0020 b.d. 0.87331 0.958 91.4 ± 1.1 870 10 1.2e-14 13.6543 0.0e+0 <0 0.0022 b.d. 0.88094 0.953 90.9 ± 0.6 900 10 2.6e-14 13.6570 0.0e+0 0.0034 0.0020 142 0.89685 0.958 91.4 ± 0.4 900 15 3.0e-14 13.7297 0.0e+0 0.0001 0.0017 5567 0.91553 0.963 92.4 ± 0.3 900 25 3.4e-14 13.7308 0.0e+0 <0 0.0016 b.d. 0.93654 0.966 92.7 ± 0.3 900 40 3.3e-14 13.5262 0.0e+0 0.0027 0.0012 181 0.95684 0.974 92.0 ± 0.3 900 60 2.6e-14 13.4739 0.0e+0 0.0065 0.0015 76 0.97313 0.966 91.0 ± 0.4 900 90 2.0e-14 13.3441 0.0e+0 0.0103 0.0005 47 0.98573 0.989 92.1 ± 0.4 950 10 3.8e-15 13.5117 2.4e-4 0.0208 0.0000 24 0.98811 1.000 95.2 ± 1.5 1000 10 5.6e-15 13.2137 0.0e+0 <0 0.0018 b.d. 0.99166 0.960 88.7 ± 1.1 1100 10 6.6e-15 14.5166 0.0e+0 0.0121 0.0035 41 0.99552 0.929 94.1 ± 1.1 1250 10 8.2e-15 15.4193 0.0e+0 <0 0.0064 b.d. 1.00000 0.877 94.4 ± 1.0 Total fusion age, TFA= 93.62 ± 0.19 Ma (including J) t = dwell time in minutes. 40(mol) = moles corrected for blank and reactor-produced 40. Ratios are corrected for blanks, decay, and interference. ·39Ar is cumulative, 40Ar* = rad fraction. Sample: C-62#2 MU J=0.0040090 T t 40(mol) 40/39 38/39 37/39 36/39 K/Ca · 39Ar 40Ar* Age (Ma) ± 600 10 1.5e-14 25.6813 3.6e-3 0.0511 0.0491 9.6 0.00535 0.435 79.1 ± 1.7 650 10 1.1e-14 16.1558 0.0e+0 0.0302 0.0091 16 0.01168 0.833 94.8 ± 0.8 700 10 1.9e-14 14.7428 0.0e+0 0.0121 0.0044 40 0.02297 0.912 94.7 ± 0.5 740 10 2.7e-14 15.3704 0.0e+0 0.0007 0.0068 679 0.03836 0.869 94.1 ± 0.4 760 10 2.7e-14 14.7133 0.0e+0 <0 0.0047 b.d. 0.05450 0.906 93.9 ± 0.5 775 10 3.2e-14 14.7543 0.0e+0 <0 0.0048 b.d. 0.07404 0.903 93.9 ± 0.4 790 10 5.3e-14 15.8837 0.0e+0 <0 0.0087 b.d. 0.10401 0.839 93.9 ± 0.4 800 10 1.0e-13 14.6505 0.0e+0 0.0024 0.0040 207 0.16616 0.920 94.9 ± 0.3 804 10 1.1e-13 14.2232 0.0e+0 0.0029 0.0022 166 0.23669 0.955 95.6 ± 0.2 807 10 1.1e-13 14.0633 0.0e+0 0.0004 0.0020 1265 0.30664 0.959 95.0 ± 0.2 810 10 1.1e-13 13.9426 0.0e+0 0.0003 0.0015 1953 0.37520 0.969 95.1 ± 0.2 813 10 1.0e-13 13.9118 0.0e+0 0.0012 0.0012 407 0.44180 0.974 95.4 ± 0.2 816 10 1.0e-13 13.9482 0.0e+0 0.0024 0.0012 205 0.50549 0.974 95.7 ± 0.2 819 10 9.0e-14 13.8668 0.0e+0 0.0045 0.0011 109 0.56350 0.976 95.3 ± 0.2 822 10 7.7e-14 13.8338 0.0e+0 <0 0.0013 b.d. 0.61293 0.973 94.8 ± 0.2 825 10 6.5e-14 13.7688 0.0e+0 0.0011 0.0011 448 0.65499 0.976 94.6 ± 0.2 828 10 5.4e-14 13.6584 0.0e+0 0.0021 0.0013 238 0.69038 0.973 93.6 ± 0.3 831 10 4.6e-14 13.6777 0.0e+0 0.0013 0.0012 367 0.72012 0.974 93.9 ± 0.3 835 10 4.0e-14 13.6206 0.0e+0 0.0034 0.0014 143 0.74599 0.970 93.1 ± 0.3 840 10 3.6e-14 13.5566 0.0e+0 0.0003 0.0013 1847 0.76966 0.972 92.9 ± 0.3 847 10 3.4e-14 13.5392 0.0e+0 <0 0.0014 b.d. 0.79208 0.969 92.5 ± 0.3 855 10 3.3e-14 13.5292 0.0e+0 <0 0.0014 b.d. 0.81396 0.969 92.4 ± 0.3 865 10 3.3e-14 13.4901 0.0e+0 0.0020 0.0016 243 0.83573 0.964 91.7 ± 0.3 880 10 3.6e-14 13.4367 0.0e+0 0.0028 0.0015 176 0.85973 0.966 91.5 ± 0.3 900 10 4.0e-14 13.4329 0.0e+0 <0 0.0016 b.d. 0.88621 0.966 91.5 ± 0.3 920 10 4.2e-14 13.5689 0.0e+0 0.0008 0.0017 626 0.91356 0.963 92.1 ± 0.3 940 10 3.7e-14 13.4693 0.0e+0 0.0015 0.0011 323 0.93781 0.975 92.6 ± 0.3 960 10 2.6e-14 13.3245 0.0e+0 0.0038 0.0010 131 0.95543 0.977 91.8 ± 0.3 990 10 2.0e-14 13.2404 0.0e+0 <0 0.0008 b.d. 0.96904 0.982 91.7 ± 0.4 1030 10 1.6e-14 13.4761 0.0e+0 <0 0.0007 b.d. 0.97940 0.985 93.5 ± 0.5 1100 10 1.6e-14 14.2630 0.0e+0 0.0201 0.0030 24 0.98968 0.939 94.3 ± 0.6 1250 10 1.6e-14 13.8605 0.0e+0 <0 0.0014 b.d. 1.00000 0.971 94.8 ± 0.5 Total fusion age, TFA= 94.12 ± 0.19 Ma (including J) t = dwell time in minutes. 40(mol) = moles corrected for blank and reactor-produced 40. Ratios are corrected for blanks, decay, and interference. ·39Ar is cumulative, 40Ar* = rad fraction. Sample: C-64 MU J=0.0039898 T t 40(mol) 40/39 38/39 37/39 36/39 K/Ca · 39Ar 40Ar* Age (Ma) 650 10 1.90E-15 18.7513 6.10E-05 <0 0.0077 b.d. 0.0008 0.879 114.9 ± 4.5 700 10 5.40E-15 20.2956 6.90E-04 <0 0.0056 b.d. 0.0031 0.919 129.5 ± 1.8 750 5 6.80E-15 20.2952 3.80E-04 0.0003 0.0054 1560 0.0060 0.921 129.8 ± 1.5 750 10 1.30E-14 20.164 0.00E+00 <0 0.0046 b.d. 0.0117 0.933 130.6 ± 0.9 750 20 2.40E-14 19.7635 0.00E+00 0.001 0.0037 488 0.0225 0.945 129.6 ± 0.6 750 40 4.50E-14 19.6211 0.00E+00 0.0098 0.0028 50 0.0431 0.958 130.4 ± 0.4 780 5 1.30E-14 19.6239 0.00E+00 <0 0.0032 b.d. 0.0490 0.952 129.6 ± 0.8 780 10 2.00E-14 19.7194 0.00E+00 0.0038 0.0032 129 0.0581 0.952 130.3 ± 0.6 780 20 3.40E-14 19.672 0.00E+00 0.0079 0.0031 62 0.0736 0.954 130.3 ± 0.5 780 40 6.60E-14 19.702 0.00E+00 0.0118 0.0033 41 0.1035 0.95 130.0 ± 0.4 795 5 2.20E-14 19.8767 0.00E+00 0.0101 0.0039 49 0.1133 0.943 130.1 ± 0.6 795 10 3.20E-14 19.9243 0.00E+00 <0 0.0041 b.d. 0.1274 0.939 129.9 ± 0.5 795 20 5.40E-14 19.9581 0.00E+00 0.0046 0.0041 107 0.1513 0.94 130.2 ± 0.4 795 40 1.00E-13 19.9099 0.00E+00 0.0002 0.0033 1967 0.1962 0.951 131.4 ± 0.3 800 5 3.40E-14 19.984 0.00E+00 <0 0.0036 b.d. 0.2113 0.946 131.2 ± 0.5 800 10 4.50E-14 19.9549 0.00E+00 0.0002 0.0032 2981 0.2315 0.953 131.9 ± 0.4 800 20 7.00E-14 19.94 0.00E+00 0.001 0.0031 490 0.2629 0.953 131.9 ± 0.4 800 40 1.20E-13 19.8688 0.00E+00 <0 0.0027 b.d. 0.3173 0.96 132.3 ± 0.3 804 5 3.50E-14 19.9614 0.00E+00 0.0081 0.0027 61 0.3332 0.96 132.9 ± 0.4 804 10 4.60E-14 19.813 0.00E+00 <0 0.0028 b.d. 0.3540 0.958 131.8 ± 0.4 804 20 6.40E-14 19.8671 0.00E+00 0.0025 0.0027 197 0.3831 0.959 132.2 ± 0.4 804 40 1.10E-13 19.8314 0.00E+00 0.0022 0.0025 226 0.4332 0.962 132.4 ± 0.3 808 5 3.00E-14 19.8495 0.00E+00 0.02 0.0025 25 0.4468 0.962 132.5 ± 0.5 808 10 4.00E-14 19.7711 0.00E+00 <0 0.0027 b.d. 0.4651 0.96 131.7 ± 0.4 808 20 5.90E-14 19.7667 0.00E+00 <0 0.0025 b.d. 0.4921 0.963 132.1 ± 0.4 808 40 9.60E-14 19.7274 0.00E+00 0.0067 0.0024 73 0.5361 0.964 131.9 ± 0.3 812 5 2.40E-14 19.858 0.00E+00 <0 0.0024 b.d. 0.5471 0.964 132.7 ± 0.6 812 10 3.20E-14 19.8542 0.00E+00 0.0023 0.0023 213 0.5617 0.966 133.1 ± 0.5 812 20 4.70E-14 19.776 0.00E+00 0.0025 0.0024 193 0.5832 0.965 132.4 ± 0.4 812 40 7.60E-14 19.7367 0.00E+00 0.004 0.0022 122 0.6182 0.967 132.4 ± 0.4 818 5 2.10E-14 19.7403 0.00E+00 <0 0.0026 b.d. 0.6278 0.962 131.7 ± 0.6 818 10 2.70E-14 19.6784 0.00E+00 0.0078 0.0024 63 0.6402 0.964 131.7 ± 0.5 818 20 4.00E-14 19.7712 0.00E+00 0.0015 0.0021 335 0.6586 0.969 132.9 ± 0.4 818 40 6.50E-14 19.6954 0.00E+00 <0 0.0021 b.d. 0.6886 0.968 132.2 ± 0.4 825 5 1.60E-14 19.6427 0.00E+00 <0 0.0025 b.d. 0.6960 0.962 131.2 ± 0.8 825 10 2.10E-14 19.6517 0.00E+00 0.0094 0.0025 52 0.7057 0.963 131.3 ± 0.7 825 20 3.20E-14 19.7497 0.00E+00 <0 0.0029 b.d. 0.7202 0.956 131.0 ± 0.5 825 40 5.20E-14 19.6725 0.00E+00 <0 0.0023 b.d. 0.7442 0.966 131.8 ± 0.4 840 5 1.40E-14 19.7761 0.00E+00 0.0131 0.0028 37 0.7506 0.959 131.6 ± 0.9 840 10 1.90E-14 19.7816 0.00E+00 0.0205 0.0027 24 0.7592 0.959 131.6 ± 0.7 840 20 2.90E-14 19.6353 0.00E+00 0.0068 0.0023 72 0.7726 0.965 131.5 ± 0.6 840 40 4.70E-14 19.4796 0.00E+00 <0 0.0019 b.d. 0.7946 0.971 131.3 ± 0.4 880 10 1.90E-14 19.4197 0.00E+00 <0 0.0021 b.d. 0.8035 0.968 130.4 ± 0.7 880 20 3.10E-14 19.3074 0.00E+00 <0 0.0019 b.d. 0.8181 0.97 130.0 ± 0.5 880 40 5.70E-14 19.2466 0.00E+00 0.0007 0.0022 654 0.8450 0.966 129.1 ± 0.4 925 10 2.40E-14 19.18 0.00E+00 0.0128 0.0021 38 0.8564 0.968 128.9 ± 0.6 925 20 4.10E-14 19.1443 0.00E+00 0.0015 0.0022 322 0.8758 0.966 128.5 ± 0.5 925 40 6.80E-14 19.1175 0.00E+00 <0 0.0019 b.d. 0.9083 0.971 128.9 ± 0.4 975 10 2.40E-14 19.1571 0.00E+00 0.0025 0.0018 192 0.9197 0.973 129.4 ± 0.6 975 20 3.40E-14 19.1252 0.00E+00 0.0114 0.0018 43 0.9359 0.972 129.1 ± 0.5 975 40 4.80E-14 19.1036 0.00E+00 0.0021 0.0012 237 0.9591 0.982 130.2 ± 0.4 1025 10 1.60E-14 19.2668 8.20E-04 0.0344 0.0012 14 0.9668 0.982 131.2 ± 0.8 1025 20 2.20E-14 19.2031 0.00E+00 0.1674 0.0011 2.9 0.9773 0.983 130.9 ± 0.6 1025 40 2.90E-14 19.0879 0.00E+00 0.2133 0.0007 2.3 0.9914 0.989 131.0 ± 0.6 1100 10 9.40E-15 19.2632 0.00E+00 0.2471 0.0017 2 0.9959 0.974 130.3 ± 1.2 1250 10 8.60E-15 19.4302 2.70E-04 0.2372 0.0011 2.1 1.0000 0.983 132.4 ± 1.3 Total fusion age, TFA= 130.67 ± 0.42 Ma (including J) Sample: C-64#2 MU J=0.0039962 T t 40(mol) 40/39 38/39 37/39 36/39 K/Ca · 39Ar 40Ar* Age (Ma) ± 600 10 2.0e-14 41.7008 4.5e-3 0.0798 0.0745 6.1 0.00385 0.472 136.6 ± 2.3 650 10 1.7e-14 23.9464 0.0e+0 0.1088 0.0113 4.5 0.00948 0.861 142.8 ± 1.1 700 10 3.3e-14 21.8182 0.0e+0 0.0042 0.0056 117 0.02130 0.925 139.9 ± 0.6 750 10 5.8e-14 21.9726 0.0e+0 0.0063 0.0072 77 0.04218 0.903 137.7 ± 0.4 775 10 5.9e-14 21.1097 0.0e+0 0.0029 0.0052 168 0.06433 0.928 135.9 ± 0.4 790 10 7.0e-14 21.6579 0.0e+0 0.0047 0.0070 105 0.08980 0.905 136.0 ± 0.5 796 10 7.3e-14 21.6163 0.0e+0 <0 0.0071 b.d. 0.11628 0.903 135.5 ± 0.4 800 10 9.4e-14 21.9101 0.0e+0 <0 0.0078 b.d. 0.15003 0.895 136.1 ± 0.4 802 10 9.9e-14 21.3409 0.0e+0 0.0018 0.0056 270 0.18655 0.922 136.5 ± 0.4 804 10 1.1e-13 21.2148 0.0e+0 <0 0.0050 b.d. 0.22609 0.930 137.0 ± 0.4 806 10 1.1e-13 20.8643 0.0e+0 0.0030 0.0037 166 0.26773 0.947 137.1 ± 0.4 808 10 1.2e-13 20.6937 0.0e+0 <0 0.0029 b.d. 0.31203 0.959 137.6 ± 0.3 810 10 1.2e-13 20.6451 0.0e+0 0.0029 0.0028 169 0.35758 0.960 137.5 ± 0.3 812 10 1.2e-13 20.5857 0.0e+0 0.0019 0.0026 255 0.40259 0.963 137.5 ± 0.3 814 10 1.1e-13 20.4442 0.0e+0 <0 0.0023 b.d. 0.44568 0.967 137.2 ± 0.3 816 10 1.0e-13 20.3628 0.0e+0 0.0020 0.0024 251 0.48554 0.966 136.4 ± 0.3 818 10 9.6e-14 20.4128 0.0e+0 0.0018 0.0024 275 0.52264 0.965 136.7 ± 0.3 820 10 8.9e-14 20.3756 0.0e+0 0.0047 0.0025 104 0.55692 0.964 136.3 ± 0.4 823 10 8.4e-14 20.3850 0.0e+0 <0 0.0025 b.d. 0.58933 0.964 136.4 ± 0.4 826 10 7.8e-14 20.3390 0.0e+0 0.0041 0.0026 120 0.61962 0.963 135.9 ± 0.4 829 10 7.4e-14 20.3348 0.0e+0 <0 0.0025 b.d. 0.64823 0.964 136.1 ± 0.4 832 10 6.8e-14 20.2877 0.0e+0 <0 0.0023 b.d. 0.67471 0.966 136.0 ± 0.4 835 10 6.4e-14 20.3461 0.0e+0 0.0021 0.0027 236 0.69960 0.961 135.7 ± 0.4 840 10 6.2e-14 20.2815 0.0e+0 0.0025 0.0026 196 0.72388 0.962 135.5 ± 0.4 850 10 7.0e-14 20.2945 0.0e+0 0.0024 0.0026 201 0.75094 0.963 135.6 ± 0.4 865 10 8.5e-14 20.2656 0.0e+0 <0 0.0026 b.d. 0.78414 0.962 135.3 ± 0.4 880 10 9.8e-14 20.1896 0.0e+0 0.0011 0.0027 426 0.82232 0.960 134.6 ± 0.3 900 10 1.2e-13 20.2441 0.0e+0 <0 0.0029 b.d. 0.86787 0.958 134.7 ± 0.3 930 10 1.3e-13 20.2327 0.0e+0 0.0080 0.0024 62 0.92014 0.965 135.6 ± 0.3 960 10 7.8e-14 19.9905 0.0e+0 0.0150 0.0021 33 0.95091 0.970 134.6 ± 0.4 990 10 4.4e-14 20.0593 0.0e+0 0.0328 0.0020 15 0.96802 0.970 135.1 ± 0.5 1030 10 3.4e-14 20.4182 0.0e+0 0.6544 0.0021 0.75 0.98103 0.970 137.4 ± 0.6 1100 10 3.2e-14 20.5017 0.0e+0 0.5099 0.0022 0.96 0.99330 0.968 137.7 ± 0.6 1250 10 1.7e-14 20.1676 0.0e+0 0.1385 0.0015 3.5 1.00000 0.978 136.8 ± 0.8 Total fusion age, TFA= 136.33 ± 0.27 Ma (including J) t = dwell time in minutes. 40(mol) = moles corrected for blank and reactor-produced 40. Ratios are corrected for blanks, decay, and interference. ·39Ar is cumulative, 40Ar* = rad fraction. Sample: C-66 MU J=0.0039930 T t 40(mol) 40/39 38/39 37/39 36/39 K/Ca · 39Ar 40Ar* Age (Ma) ± 650 10 2.8e-14 27.4165 0.0e+0 0.0353 0.0462 14 0.00707 0.503 96.6 ± 1.2 650 20 1.1e-14 16.2658 8.7e-4 <0 0.0071 b.d. 0.01150 0.871 99.3 ± 0.9 725 10 2.9e-14 16.0968 0.0e+0 <0 0.0066 b.d. 0.02367 0.879 99.2 ± 0.5 725 20 2.7e-14 15.6907 0.0e+0 <0 0.0056 b.d. 0.03559 0.895 98.4 ± 0.4 760 10 3.1e-14 14.9313 0.0e+0 <0 0.0038 b.d. 0.04991 0.925 96.8 ± 0.4 760 20 4.9e-14 14.7416 0.0e+0 0.0070 0.0030 70 0.07285 0.940 97.1 ± 0.3 780 10 6.8e-14 14.8596 0.0e+0 <0 0.0042 b.d. 0.10397 0.916 95.4 ± 0.3 780 20 1.6e-13 14.3938 0.0e+0 0.0002 0.0025 2011 0.17851 0.949 95.8 ± 0.2 790 10 1.2e-13 14.3237 0.0e+0 0.0005 0.0019 893 0.23570 0.960 96.5 ± 0.2 790 20 1.9e-13 14.2836 0.0e+0 <0 0.0016 b.d. 0.32755 0.967 96.8 ± 0.2 796 10 1.2e-13 14.3827 0.0e+0 0.0003 0.0017 1623 0.38292 0.966 97.4 ± 0.2 796 20 1.8e-13 14.4395 0.0e+0 0.0029 0.0014 169 0.46993 0.972 98.4 ± 0.2 800 10 9.6e-14 14.5664 0.0e+0 <0 0.0012 b.d. 0.51501 0.975 99.6 ± 0.2 800 20 1.4e-13 14.7155 0.0e+0 0.0003 0.0013 1840 0.58201 0.975 100.5 ± 0.2 804 10 7.2e-14 14.7557 0.0e+0 0.0004 0.0011 1149 0.61516 0.977 101.0 ± 0.3 804 20 1.1e-13 14.9113 0.0e+0 0.0008 0.0015 642 0.66442 0.970 101.3 ± 0.2 808 10 5.2e-14 14.8564 0.0e+0 0.0020 0.0014 240 0.68844 0.973 101.2 ± 0.3 808 20 7.7e-14 14.8640 0.0e+0 0.0014 0.0015 349 0.72401 0.969 100.9 ± 0.3 812 10 3.8e-14 15.0414 0.0e+0 <0 0.0025 b.d. 0.74108 0.951 100.2 ± 0.4 812 20 5.6e-14 14.8758 0.0e+0 0.0042 0.0016 116 0.76660 0.968 100.8 ± 0.3 816 10 2.7e-14 14.6883 0.0e+0 <0 0.0013 b.d. 0.77933 0.973 100.2 ± 0.3 816 20 4.2e-14 14.7819 0.0e+0 0.0061 0.0016 81 0.79895 0.968 100.2 ± 0.3 822 10 2.2e-14 14.6014 0.0e+0 <0 0.0011 b.d. 0.80920 0.977 100.0 ± 0.4 822 20 3.5e-14 14.7280 0.0e+0 0.0075 0.0018 66 0.82557 0.963 99.4 ± 0.3 828 10 1.8e-14 14.5485 0.0e+0 0.0039 0.0009 125 0.83411 0.982 100.1 ± 0.5 828 20 2.9e-14 14.7049 0.0e+0 <0 0.0023 b.d. 0.84753 0.954 98.3 ± 0.4 835 10 1.5e-14 14.3421 0.0e+0 <0 0.0005 b.d. 0.85479 0.990 99.5 ± 0.6 835 20 2.5e-14 14.5550 0.0e+0 0.0012 0.0016 408 0.86633 0.968 98.7 ± 0.4 850 10 1.6e-14 14.3477 0.0e+0 <0 0.0016 b.d. 0.87384 0.966 97.2 ± 0.5 850 20 2.5e-14 14.4081 0.0e+0 <0 0.0013 b.d. 0.88558 0.974 98.3 ± 0.4 870 10 1.7e-14 14.1709 0.0e+0 <0 0.0008 b.d. 0.89390 0.983 97.7 ± 0.5 870 20 2.8e-14 14.7894 0.0e+0 0.0080 0.0027 61 0.90687 0.946 98.1 ± 0.4 900 10 2.3e-14 14.1611 0.0e+0 0.0100 0.0012 49 0.91816 0.975 96.8 ± 0.4 900 20 4.0e-14 14.4988 0.0e+0 <0 0.0019 b.d. 0.93693 0.962 97.8 ± 0.3 940 10 3.5e-14 14.4441 0.0e+0 <0 0.0008 b.d. 0.95330 0.984 99.6 ± 0.3 940 20 3.0e-14 14.3687 0.0e+0 0.0070 0.0016 70 0.96747 0.968 97.5 ± 0.4 1000 10 1.7e-14 14.0984 0.0e+0 0.0113 0.0006 44 0.97573 0.988 97.6 ± 0.5 1000 20 1.6e-14 14.3870 0.0e+0 0.0145 0.0022 34 0.98312 0.954 96.2 ± 0.5 1030 10 6.5e-15 13.9629 1.8e-3 0.0135 0.0000 36 0.98631 1.000 97.9 ± 1.0 1030 20 7.5e-15 14.8080 1.1e-3 0.0236 0.0034 21 0.98976 0.932 96.7 ± 1.1 1100 10 4.5e-15 16.3718 2.0e-3 0.0468 0.0098 10 0.99163 0.823 94.5 ± 1.8 1100 20 3.8e-15 17.3977 2.4e-4 <0 0.0123 b.d. 0.99313 0.792 96.6 ± 2.2 1250 10 1.2e-14 15.4809 2.4e-4 0.0087 0.0086 56 0.99845 0.836 90.9 ± 0.7 1250 20 5.7e-15 24.9902 0.0e+0 0.0100 0.0385 49 1.00000 0.545 95.5 ± 3.0 Total fusion age, TFA= 98.41 ± 0.19 Ma (including J) 40(mol) = moles corrected for blank and reactor-produced 40. Ratios are corrected for blanks, decay, and interference. ·39Ar is cumulative, 40Ar* = rad fraction. Sample: C-67 MU J=0.0040127 T t 40(mol) 40/39 38/39 37/39 36/39 K/Ca · 39Ar 40Ar* Age (Ma) ± 550 10 9.1e-15 46.0800 2.7e-3 0.1539 0.1202 3.2 0.00177 0.229 74.9 ± 5.1 600 10 4.4e-15 19.0597 2.9e-3 0.5770 0.0172 0.85 0.00386 0.733 98.4 ± 2.7 625 10 4.4e-15 16.7879 2.6e-3 0.2771 0.0070 1.8 0.00622 0.876 103.4 ± 2.5 650 10 6.2e-15 15.7061 0.0e+0 0.0092 0.0040 54 0.00975 0.924 102.2 ± 1.5 675 10 8.3e-15 15.3359 0.0e+0 <0 0.0022 b.d. 0.01460 0.957 103.2 ± 1.1 700 10 1.1e-14 14.9505 0.0e+0 0.0012 0.0017 426 0.02119 0.966 101.7 ± 0.8 725 10 1.4e-14 14.5613 0.0e+0 0.0004 0.0015 1100 0.03003 0.970 99.4 ± 0.7 740 10 1.5e-14 14.4593 0.0e+0 0.0019 0.0017 263 0.03932 0.965 98.3 ± 0.6 750 10 1.6e-14 14.4964 0.0e+0 0.0035 0.0015 139 0.04904 0.969 98.9 ± 0.6 760 10 1.8e-14 14.4821 0.0e+0 <0 0.0016 b.d. 0.06043 0.967 98.6 ± 0.5 770 10 2.3e-14 14.5907 0.0e+0 <0 0.0023 b.d. 0.07437 0.954 98.0 ± 0.5 780 10 2.8e-14 14.4557 0.0e+0 0.0072 0.0015 68 0.09201 0.969 98.6 ± 0.4 790 10 4.1e-14 14.8854 0.0e+0 <0 0.0026 b.d. 0.11654 0.947 99.3 ± 0.4 800 10 7.2e-14 14.8735 0.0e+0 <0 0.0020 b.d. 0.16003 0.960 100.5 ± 0.3 805 10 8.8e-14 14.7592 0.0e+0 0.0011 0.0015 459 0.21388 0.971 100.9 ± 0.2 810 10 1.1e-13 14.6094 0.0e+0 <0 0.0013 b.d. 0.28094 0.973 100.1 ± 0.2 815 10 1.3e-13 14.5543 0.0e+0 0.0001 0.0012 5678 0.35896 0.976 100.0 ± 0.2 818 10 1.1e-13 14.4971 0.0e+0 0.0022 0.0009 220 0.42958 0.981 100.1 ± 0.2 821 10 1.2e-13 14.4825 0.0e+0 0.0002 0.0009 3153 0.50347 0.982 100.1 ± 0.2 824 10 1.0e-13 14.4874 0.0e+0 <0 0.0008 b.d. 0.56742 0.984 100.4 ± 0.2 827 10 8.5e-14 14.5092 0.0e+0 <0 0.0008 b.d. 0.61983 0.984 100.5 ± 0.3 830 10 6.9e-14 14.5033 0.0e+0 <0 0.0007 b.d. 0.66239 0.986 100.6 ± 0.3 835 10 5.9e-14 14.4715 0.0e+0 <0 0.0009 b.d. 0.69897 0.981 100.0 ± 0.3 840 10 5.0e-14 14.3942 0.0e+0 0.0032 0.0007 152 0.73046 0.985 99.8 ± 0.3 845 10 4.3e-14 14.2518 0.0e+0 0.0037 0.0007 133 0.75755 0.986 99.0 ± 0.3 850 10 3.7e-14 14.1783 0.0e+0 0.0073 0.0007 67 0.78112 0.985 98.4 ± 0.3 860 10 3.7e-14 14.0805 0.0e+0 0.0016 0.0006 311 0.80445 0.987 97.9 ± 0.3 870 10 3.5e-14 13.9765 0.0e+0 0.0041 0.0007 121 0.82685 0.986 97.1 ± 0.3 880 10 3.4e-14 13.8947 0.0e+0 0.0027 0.0005 181 0.84859 0.988 96.8 ± 0.3 890 10 3.2e-14 13.8457 0.0e+0 <0 0.0006 b.d. 0.86938 0.988 96.4 ± 0.3 900 10 3.0e-14 13.9379 0.0e+0 0.0018 0.0004 267 0.88899 0.993 97.5 ± 0.3 915 10 2.6e-14 14.0206 0.0e+0 <0 0.0003 b.d. 0.90594 0.994 98.1 ± 0.3 930 10 2.6e-14 14.0895 0.0e+0 <0 0.0004 b.d. 0.92245 0.991 98.4 ± 0.4 950 10 2.4e-14 13.7272 0.0e+0 0.0127 0.0003 38 0.93804 0.994 96.2 ± 0.4 975 10 2.4e-14 13.2987 0.0e+0 0.0175 0.0003 28 0.95434 0.994 93.3 ± 0.4 1000 10 1.8e-14 13.2333 0.0e+0 0.0200 0.0001 25 0.96638 0.998 93.1 ± 0.4 1025 10 1.0e-14 13.6102 0.0e+0 0.1298 0.0000 3.8 0.97304 1.000 96.6 ± 0.7 1050 10 6.7e-15 13.7482 3.9e-4 0.4677 0.0000 1.0 0.97745 1.000 97.1 ± 0.9 1075 10 4.9e-15 13.7938 0.0e+0 0.0451 0.0000 11 0.98063 1.000 99.6 ± 1.2 1100 10 4.1e-15 14.4847 0.0e+0 0.0358 0.0010 14 0.98318 0.979 99.8 ± 1.6 1150 10 4.8e-15 14.2903 0.0e+0 0.0740 0.0000 6.6 0.98619 1.000 108.0 ± 1.2 1250 15 2.3e-14 14.9439 0.0e+0 0.0372 0.0009 13 1.00000 0.982 103.2 ± 0.4 Total fusion age, TFA= 99.38 ± 0.20 Ma (including J) t = dwell time in minutes. 40(mol) = moles corrected for blank and reactor-produced 40. Ratios are corrected for blanks, decay, and interference. ·39Ar is cumulative, 40Ar* = rad fraction. Sample: C-79 MU J=0.0039785 T t 40(mol) 40/39 38/39 37/39 36/39 K/Ca · 39Ar 40Ar* Age (Ma) ± 650 10 2.5e-14 18.9577 6.1e-4 0.1878 0.0266 2.6 0.00633 0.586 78.0 ± 0.8 730 10 4.1e-14 14.5005 0.0e+0 0.0098 0.0075 50 0.01994 0.847 86.1 ± 0.4 770 10 5.1e-14 13.3133 0.0e+0 <0 0.0040 b.d. 0.03850 0.911 85.1 ± 0.3 770 15 5.4e-14 13.0249 0.0e+0 0.0022 0.0028 226 0.05838 0.936 85.5 ± 0.3 770 20 6.9e-14 14.0095 0.0e+0 0.0052 0.0056 94 0.08217 0.881 86.5 ± 0.3 770 30 1.3e-13 13.5458 0.0e+0 0.0014 0.0035 354 0.12713 0.924 87.7 ± 0.2 785 10 1.0e-13 13.3587 0.0e+0 0.0025 0.0027 194 0.16379 0.940 87.9 ± 0.2 785 15 1.3e-13 13.0172 0.0e+0 <0 0.0018 b.d. 0.21111 0.959 87.4 ± 0.2 785 20 1.4e-13 12.8501 0.0e+0 <0 0.0014 b.d. 0.26367 0.967 87.1 ± 0.2 785 30 1.7e-13 12.7638 0.0e+0 0.0003 0.0013 1922 0.32751 0.969 86.7 ± 0.2 785 50 2.2e-13 12.6150 0.0e+0 0.0008 0.0013 604 0.41095 0.970 85.8 ± 0.2 785 50 1.7e-13 12.4265 0.0e+0 0.0005 0.0011 987 0.47697 0.974 84.8 ± 0.2 785 60 1.6e-13 12.3357 0.0e+0 <0 0.0010 b.d. 0.53922 0.976 84.4 ± 0.2 805 10 6.1e-14 12.3174 0.0e+0 0.0081 0.0014 61 0.56302 0.966 83.4 ± 0.2 805 15 7.2e-14 12.1358 0.0e+0 <0 0.0009 b.d. 0.59176 0.979 83.3 ± 0.2 805 20 8.1e-14 12.1650 0.0e+0 0.0041 0.0010 120 0.62397 0.976 83.3 ± 0.2 805 40 1.2e-13 12.1284 0.0e+0 0.0019 0.0010 259 0.67227 0.977 83.1 ± 0.2 815 10 3.8e-14 12.0685 0.0e+0 <0 0.0008 b.d. 0.68738 0.979 82.9 ± 0.3 815 20 6.1e-14 12.0944 0.0e+0 0.0007 0.0011 719 0.71180 0.974 82.6 ± 0.2 815 30 7.3e-14 12.1323 0.0e+0 0.0101 0.0011 48 0.74091 0.974 82.9 ± 0.2 815 50 9.2e-14 12.1607 0.0e+0 0.0016 0.0011 303 0.77752 0.974 83.0 ± 0.2 815 60 7.8e-14 12.1298 0.0e+0 0.0009 0.0010 533 0.80857 0.976 83.0 ± 0.2 830 10 1.8e-14 12.1494 0.0e+0 0.0031 0.0010 156 0.81561 0.975 83.1 ± 0.4 830 15 2.4e-14 12.1584 0.0e+0 <0 0.0012 b.d. 0.82505 0.971 82.8 ± 0.4 830 20 2.8e-14 12.1640 0.0e+0 0.0118 0.0011 42 0.83622 0.973 83.0 ± 0.3 830 30 3.7e-14 12.8150 0.0e+0 0.0021 0.0033 231 0.85011 0.925 83.1 ± 0.3 830 50 4.6e-14 12.2221 0.0e+0 0.0041 0.0010 120 0.86840 0.975 83.5 ± 0.3 900 10 5.0e-14 12.1324 0.0e+0 0.0073 0.0012 67 0.88844 0.971 82.6 ± 0.2 950 10 1.0e-13 12.1995 0.0e+0 0.0056 0.0012 87 0.92879 0.971 83.1 ± 0.2 1000 10 6.3e-14 12.3571 0.0e+0 0.0075 0.0012 65 0.95351 0.972 84.2 ± 0.2 1100 10 4.1e-14 12.6569 0.0e+0 0.0159 0.0024 31 0.96917 0.945 83.8 ± 0.3 1250 10 8.2e-14 12.8382 0.0e+0 0.0099 0.0013 50 1.00000 0.970 87.2 ± 0.2 Total fusion age, TFA= 84.86 ± 0.17 Ma (including J) t = dwell time in minutes. 40(mol) = moles corrected for blank and reactor-produced 40. Ratios are corrected for blanks, decay, and interference. ·39Ar is cumulative, 40Ar* = rad fraction. Sample: C-106 MU J=0.0039865 T t 40(mol) 40/39 38/39 37/39 36/39 K/Ca · 39Ar 40Ar* Age (Ma) ± 650 10 3.7e-14 28.7484 3.5e-4 0.0674 0.0270 7.3 0.00770 0.722 143.4 ± 1.0 730 10 7.1e-14 23.1638 0.0e+0 0.0099 0.0042 50 0.02595 0.947 151.2 ± 0.4 760 10 7.3e-14 22.4845 0.0e+0 0.0015 0.0030 321 0.04528 0.961 149.1 ± 0.4 760 15 7.7e-14 22.4936 0.0e+0 0.0045 0.0033 110 0.06571 0.956 148.4 ± 0.4 760 20 8.2e-14 22.0856 0.0e+0 0.0008 0.0024 651 0.08785 0.967 147.4 ± 0.4 780 10 7.9e-14 22.1544 0.0e+0 <0 0.0032 b.d. 0.10918 0.958 146.5 ± 0.4 780 15 1.1e-13 22.2533 0.0e+0 0.0024 0.0033 205 0.13926 0.957 147.0 ± 0.4 780 20 1.5e-13 22.1724 0.0e+0 0.0030 0.0032 161 0.18056 0.957 146.5 ± 0.3 795 10 1.8e-13 22.1697 0.0e+0 0.0019 0.0031 264 0.22936 0.958 146.7 ± 0.3 795 15 2.6e-13 21.7608 0.0e+0 0.0020 0.0022 247 0.30097 0.971 145.8 ± 0.3 795 15 2.4e-13 21.7337 0.0e+0 0.0018 0.0020 274 0.36792 0.973 146.1 ± 0.3 800 10 2.0e-13 21.7983 0.0e+0 0.0030 0.0019 164 0.42308 0.974 146.5 ± 0.3 800 12 2.3e-13 21.8493 0.0e+0 0.0037 0.0020 132 0.48601 0.973 146.7 ± 0.3 800 15 2.5e-13 21.8591 0.0e+0 0.0043 0.0019 113 0.55498 0.974 147.0 ± 0.3 805 10 1.8e-13 21.9928 0.0e+0 0.0052 0.0019 94 0.60382 0.975 147.9 ± 0.3 805 12 1.8e-13 22.0598 0.0e+0 0.0058 0.0019 85 0.65158 0.974 148.3 ± 0.3 805 15 1.7e-13 22.1152 0.0e+0 0.0046 0.0019 107 0.69650 0.975 148.8 ± 0.3 812 10 1.1e-13 22.1823 0.0e+0 0.0044 0.0018 111 0.72574 0.976 149.3 ± 0.4 812 18 1.4e-13 22.1405 0.0e+0 0.0063 0.0018 78 0.76355 0.976 149.1 ± 0.3 812 30 1.5e-13 22.1519 0.0e+0 0.0048 0.0017 101 0.80464 0.977 149.4 ± 0.3 812 50 1.4e-13 21.9700 0.0e+0 0.0011 0.0014 448 0.84263 0.981 148.7 ± 0.3 820 10 2.6e-14 21.7083 0.0e+0 0.0114 0.0012 43 0.84975 0.983 147.3 ± 0.7 820 18 3.7e-14 21.7091 0.0e+0 0.0206 0.0011 24 0.86002 0.985 147.5 ± 0.6 820 30 4.7e-14 21.5671 0.0e+0 0.0160 0.0010 31 0.87301 0.986 146.8 ± 0.5 835 10 2.0e-14 21.6398 0.0e+0 0.0082 0.0009 60 0.87865 0.988 147.5 ± 0.8 835 18 3.1e-14 21.4771 0.0e+0 0.0106 0.0009 46 0.88730 0.987 146.4 ± 0.6 835 30 4.3e-14 21.6225 0.0e+0 0.0007 0.0009 689 0.89902 0.988 147.5 ± 0.5 865 10 2.6e-14 21.6833 0.0e+0 0.0114 0.0011 43 0.90627 0.985 147.4 ± 0.7 865 18 4.0e-14 21.8706 0.0e+0 0.0037 0.0013 134 0.91724 0.982 148.2 ± 0.5 865 30 4.9e-14 21.8218 0.0e+0 0.0017 0.0009 289 0.93075 0.988 148.8 ± 0.5 900 10 3.1e-14 22.1248 0.0e+0 0.0073 0.0014 67 0.93921 0.981 149.7 ± 0.6 900 18 3.3e-14 21.9837 0.0e+0 0.0054 0.0008 90 0.94813 0.989 150.0 ± 0.6 900 30 3.4e-14 21.9321 0.0e+0 0.0118 0.0005 41 0.95749 0.993 150.3 ± 0.6 950 10 2.2e-14 21.9429 0.0e+0 <0 0.0013 b.d. 0.96356 0.982 148.7 ± 0.7 950 18 2.7e-14 22.0672 0.0e+0 <0 0.0012 b.d. 0.97094 0.983 149.7 ± 0.7 950 30 2.9e-14 22.0187 0.0e+0 <0 0.0004 b.d. 0.97873 0.995 151.1 ± 0.7 1000 10 1.4e-14 22.1782 0.0e+0 0.0091 0.0013 54 0.98255 0.982 150.3 ± 1.1 1000 18 1.7e-14 22.2316 0.0e+0 0.0226 0.0003 22 0.98698 0.995 152.5 ± 1.0 1000 30 1.6e-14 21.7587 0.0e+0 0.0205 0.0000 24 0.99141 1.000 150.9 ± 1.0 1100 10 8.7e-15 23.0267 9.0e-4 0.0706 0.0033 6.9 0.99367 0.957 151.9 ± 1.6 1250 10 2.5e-14 23.3903 1.7e-4 0.0794 0.0038 6.2 1.00000 0.952 153.4 ± 0.8 Total fusion age, TFA= 147.67 ± 0.29 Ma (including J) t = dwell time in minutes. 40(mol) = moles corrected for blank and reactor-produced 40. Ratios are corrected for blanks, decay, and interference. ·39Ar is cumulative, 40Ar* = rad fraction.