<p>Appendix 2: Ion microprobe analytical results for zircons from the eight sandstone samples from the Mosquito Creek Formation (Table A2-1, A2-2, A2-3). Table A2.1. Ion microprobe analytical results for zircons from sample GSWA 169187</p><p>Grp Spot Grain 238U 232Th 232Th f204 238U/206Pb 207Pb/206Pb 238U/206Pb* 207Pb*/206Pb* 238U/206Pb* 207Pb*/206Pb* Disc no. no. .spot (ppm) (ppm) /238U (%) ±1 ±1 ±1 ±1 date (Ma) ±1 date (Ma) ±1 (%)</p><p>Youngest group of detrital zircons, arranged by ascending 207Pb*/206Pb* age: 1 25 25.1 81 35 0.45 0.179 1.669 ± 0.043 0.22793 ± 0.00153 1.672 ± 0.044 0.22635 ± 0.00169 3023 ± 63 3026 ± 12 0.1 1 35 35.1 61 29 0.50 0.123 1.674 ± 0.024 0.22753 ± 0.00155 1.676 ± 0.024 0.22644 ± 0.00159 3017 ± 34 3027 ± 11 0.3 1 50 50.1 106 75 0.73 0.045 1.659 ± 0.021 0.22719 ± 0.00117 1.660 ± 0.021 0.22680 ± 0.00119 3040 ± 31 3030 ± 8 –0.3 1 21 21.1 71 26 0.38 0.212 1.637 ± 0.043 0.22880 ± 0.00163 1.640 ± 0.043 0.22692 ± 0.00182 3069 ± 64 3030 ± 13 –1.3 1 40 40.1 52 21 0.41 0.034 1.623 ± 0.024 0.22807 ± 0.00163 1.623 ± 0.024 0.22776 ± 0.00170 3094 ± 36 3036 ± 12 –1.9 1 55 55.1 100 38 0.39 –0.009 1.644 ± 0.021 0.22787 ± 0.00114 1.644 ± 0.021 0.22794 ± 0.00115 3063 ± 31 3038 ± 8 –0.8 1 45 45.1 116 53 0.48 –0.018 1.640 ± 0.024 0.22785 ± 0.00113 1.640 ± 0.024 0.22801 ± 0.00117 3069 ± 35 3038 ± 8 –1.0 1 23 23.1 113 59 0.55 0.205 1.627 ± 0.042 0.23032 ± 0.00133 1.630 ± 0.043 0.22851 ± 0.00165 3084 ± 64 3042 ± 12 –1.4 1 11 11.1 94 50 0.55 0.254 1.774 ± 0.025 0.23188 ± 0.00133 1.778 ± 0.025 0.22964 ± 0.00150 2876 ± 33 3050 ± 10 5.7 1 56 56.1 130 73 0.58 0.006 1.669 ± 0.024 0.22981 ± 0.00097 1.669 ± 0.024 0.22976 ± 0.00098 3027 ± 34 3050 ± 7 0.8 1 24 24.1 73 20 0.29 0.289 1.675 ± 0.044 0.23378 ± 0.00217 1.680 ± 0.044 0.23122 ± 0.00228 3011 ± 63 3061 ± 16 1.6</p><p>Older detrital zircons, arranged by ascending 207Pb*/206Pb* age: 2 43 43.1 96 43 0.47 0.250 1.659 ± 0.021 0.23440 ± 0.00125 1.663 ± 0.021 0.23219 ± 0.00145 3034 ± 31 3067 ± 10 1.1 2 51 51.1 80 119 1.53 0.153 1.661 ± 0.022 0.23428 ± 0.00163 1.663 ± 0.022 0.23293 ± 0.00172 3035 ± 32 3072 ± 12 1.2 2 39 39.1 116 80 0.71 0.490 1.722 ± 0.022 0.23792 ± 0.00153 1.731 ± 0.022 0.23359 ± 0.00172 2940 ± 30 3077 ± 12 4.5 2 30 30.1 171 96 0.58 0.046 1.633 ± 0.042 0.23425 ± 0.00111 1.634 ± 0.042 0.23384 ± 0.00116 3078 ± 62 3079 ± 8 0.0 2 7 7.1 72 25 0.35 0.138 1.634 ± 0.024 0.23591 ± 0.00155 1.636 ± 0.024 0.23469 ± 0.00166 3075 ± 36 3084 ± 11 0.3 2 33 33.1 105 62 0.62 0.108 1.667 ± 0.021 0.23577 ± 0.00121 1.669 ± 0.021 0.23482 ± 0.00124 3027 ± 31 3085 ± 8 1.9 2 58 58.1 195 108 0.57 0.130 1.632 ± 0.024 0.23598 ± 0.00112 1.634 ± 0.024 0.23483 ± 0.00115 3078 ± 36 3085 ± 8 0.2 2 16 16.1 135 75 0.57 0.504 1.711 ± 0.023 0.23954 ± 0.00113 1.720 ± 0.023 0.23509 ± 0.00134 2955 ± 32 3087 ± 9 4.3 2 60 60.1 70 34 0.50 0.000 1.629 ± 0.023 0.23619 ± 0.00133 1.629 ± 0.023 0.23620 ± 0.00133 3086 ± 34 3095 ± 9 0.3 2 20 20.1 86 46 0.55 –0.002 1.625 ± 0.042 0.23618 ± 0.00150 1.625 ± 0.042 0.23620 ± 0.00150 3092 ± 64 3095 ± 10 0.1 2 41 41.1 313 132 0.44 –0.003 1.621 ± 0.018 0.23682 ± 0.00070 1.621 ± 0.018 0.23684 ± 0.00070 3098 ± 27 3099 ± 5 0.0 2 5 5.1 127 82 0.66 0.044 1.620 ± 0.022 0.23729 ± 0.00120 1.621 ± 0.022 0.23690 ± 0.00120 3098 ± 34 3099 ± 8 0.0 2 29 29.1 145 77 0.55 0.003 1.620 ± 0.042 0.23694 ± 0.00116 1.620 ± 0.042 0.23692 ± 0.00123 3099 ± 63 3099 ± 8 0.0 2 6 6.1 102 63 0.63 0.029 1.659 ± 0.023 0.23807 ± 0.00137 1.660 ± 0.024 0.23782 ± 0.00138 3040 ± 34 3105 ± 9 2.1 2 34 34.1 156 91 0.60 0.113 1.633 ± 0.019 0.24155 ± 0.00145 1.635 ± 0.019 0.24055 ± 0.00147 3077 ± 29 3124 ± 10 1.5 2 10 10.1 66 36 0.57 0.204 1.595 ± 0.024 0.24375 ± 0.00159 1.599 ± 0.024 0.24196 ± 0.00179 3132 ± 37 3133 ± 12 0.0 2 42 42.1 99 48 0.50 0.082 1.618 ± 0.021 0.24380 ± 0.00125 1.619 ± 0.021 0.24308 ± 0.00130 3101 ± 32 3140 ± 9 1.3 2 46 46.1 131 98 0.77 0.058 1.628 ± 0.033 0.24413 ± 0.00114 1.629 ± 0.033 0.24362 ± 0.00115 3086 ± 49 3144 ± 8 1.8 2 27 27.1 108 34 0.33 0.205 1.592 ± 0.041 0.24543 ± 0.00136 1.596 ± 0.041 0.24363 ± 0.00146 3137 ± 64 3144 ± 10 0.2 2 12 12.1 94 35 0.39 0.161 1.585 ± 0.023 0.24722 ± 0.00134 1.588 ± 0.023 0.24580 ± 0.00143 3149 ± 37 3158 ± 9 0.3 2 36 36.1 175 166 0.98 –0.031 1.567 ± 0.018 0.24564 ± 0.00093 1.567 ± 0.018 0.24591 ± 0.00094 3182 ± 30 3159 ± 6 –0.8 2 2 2.1 113 69 0.63 0.057 1.634 ± 0.024 0.24776 ± 0.00127 1.635 ± 0.024 0.24725 ± 0.00129 3077 ± 35 3167 ± 8 2.8 2 48 48.1 161 161 1.03 0.055 1.624 ± 0.022 0.24829 ± 0.00209 1.625 ± 0.022 0.24781 ± 0.00210 3092 ± 34 3171 ± 13 2.5 2 1 1.1 135 99 0.76 0.072 1.585 ± 0.022 0.24938 ± 0.00119 1.586 ± 0.022 0.24875 ± 0.00123 3152 ± 34 3177 ± 8 0.8 2 52 52.1 111 102 0.95 0.050 1.511 ± 0.053 0.25440 ± 0.00116 1.511 ± 0.053 0.25397 ± 0.00117 3274 ± 89 3210 ± 7 –2.0 2 22 22.1 128 66 0.53 0.000 1.573 ± 0.041 0.25515 ± 0.00129 1.573 ± 0.041 0.25515 ± 0.00132 3173 ± 65 3217 ± 8 1.4 2 3 3.1 107 83 0.80 0.201 1.538 ± 0.022 0.25852 ± 0.00135 1.541 ± 0.022 0.25677 ± 0.00148 3224 ± 36 3227 ± 9 0.1 2 54 54.1 107 100 0.96 0.005 1.535 ± 0.020 0.25980 ± 0.00123 1.535 ± 0.020 0.25976 ± 0.00125 3234 ± 34 3245 ± 8 0.3 2 14 14.1 144 84 0.60 0.160 1.508 ± 0.020 0.27922 ± 0.00114 1.511 ± 0.020 0.27784 ± 0.00119 3275 ± 34 3351 ± 7 2.3 2 9 9.1 33 14 0.44 0.256 1.484 ± 0.026 0.28760 ± 0.00241 1.487 ± 0.026 0.28540 ± 0.00269 3315 ± 45 3393 ± 15 2.3 2 59 59.1 144 185 1.33 0.066 1.463 ± 0.017 0.29009 ± 0.00103 1.464 ± 0.017 0.28952 ± 0.00106 3356 ± 31 3415 ± 6 1.7 2 37 37.1 164 45 0.28 0.458 1.546 ± 0.018 0.29467 ± 0.00108 1.553 ± 0.018 0.29075 ± 0.00125 3204 ± 30 3422 ± 7 6.4 2 38 38.1 196 204 1.08 0.030 1.383 ± 0.016 0.29962 ± 0.00097 1.384 ± 0.016 0.29936 ± 0.00098 3506 ± 32 3467 ± 5 –1.1 2 53 53.1 136 167 1.27 0.024 1.438 ± 0.017 0.30019 ± 0.00120 1.438 ± 0.017 0.29999 ± 0.00121 3403 ± 32 3470 ± 6 1.9 2 31 31.1 63 63 1.05 0.313 1.346 ± 0.037 0.30770 ± 0.00227 1.350 ± 0.037 0.30505 ± 0.00241 3572 ± 74 3496 ± 12 –2.2 2 13 13.1 50 51 1.06 0.234 1.397 ± 0.022 0.30931 ± 0.00198 1.400 ± 0.022 0.30733 ± 0.00214 3474 ± 42 3508 ± 11 1.0 2 18 18.1 42 28 0.70 0.120 1.391 ± 0.023 0.30917 ± 0.00217 1.393 ± 0.023 0.30815 ± 0.00224 3488 ± 44 3512 ± 11 0.7 2 32 32.1 77 46 0.63 0.070 1.405 ± 0.037 0.30963 ± 0.00266 1.406 ± 0.037 0.30904 ± 0.00269 3463 ± 70 3516 ± 13 1.5 2 47 47.1 71 58 0.85 0.064 1.377 ± 0.019 0.31052 ± 0.00169 1.378 ± 0.019 0.30998 ± 0.00174 3518 ± 38 3521 ± 9 0.1 2 28 28.1 111 67 0.63 0.088 1.388 ± 0.036 0.31091 ± 0.00148 1.389 ± 0.036 0.31017 ± 0.00150 3495 ± 70 3522 ± 7 0.8 2 15 15.1 82 28 0.36 0.164 1.339 ± 0.020 0.31201 ± 0.00154 1.341 ± 0.020 0.31063 ± 0.00159 3591 ± 42 3524 ± 8 –1.9 2 49 49.1 46 21 0.47 0.124 1.379 ± 0.021 0.31296 ± 0.00201 1.381 ± 0.021 0.31191 ± 0.00217 3512 ± 41 3530 ± 11 0.5 2 19 19.1 102 110 1.12 0.070 1.410 ± 0.036 0.31331 ± 0.00158 1.411 ± 0.036 0.31272 ± 0.00158 3454 ± 69 3534 ± 8 2.3 2 26 26.1 33 24 0.75 0.371 1.372 ± 0.039 0.31588 ± 0.00270 1.377 ± 0.039 0.31275 ± 0.00286 3520 ± 76 3535 ± 14 0.4 2 4 4.1 225 148 0.68 0.090 1.407 ± 0.018 0.31466 ± 0.00103 1.408 ± 0.018 0.31390 ± 0.00105 3459 ± 35 3540 ± 5 2.3 2 8 8.1 126 75 0.62 0.105 1.365 ± 0.019 0.31611 ± 0.00135 1.366 ± 0.019 0.31523 ± 0.00140 3540 ± 37 3547 ± 7 0.2 2 57 57.1 204 88 0.45 0.039 1.370 ± 0.033 0.31857 ± 0.00151 1.371 ± 0.033 0.31824 ± 0.00152 3531 ± 66 3561 ± 7 0.8 2 44 44.1 95 68 0.74 0.013 1.306 ± 0.017 0.32697 ± 0.00145 1.306 ± 0.017 0.32687 ± 0.00147 3664 ± 36 3602 ± 7 –1.7</p><p>Discarded analysis (discordance > 10%): D 17 17.1 146 61 0.43 0.475 1.876 ± 0.025 0.23715 ± 0.00178 1.885 ± 0.025 0.23296 ± 0.00193 2743 ± 30 3072 ± 13 10.7 Table A2.2. Ion microprobe analytical results for zircons from sample GSWA 169194</p><p>Grp Spot Grain 238U 232Th 232Th f204 238U/206Pb 207Pb/206Pb 238U/206Pb* 207Pb*/206Pb* 238U/206Pb* 207Pb*/206Pb* Disc no. no. .spot (ppm) (ppm) /238U (%) ±1 ±1 ±1 ±1 date (Ma) ±1 date (Ma) ±1 (%)</p><p>Youngest detrital zircon: 1 27 27.1 96 83 0.88 0.174 1.677 ± 0.024 0.22408 ± 0.00136 1.680 ± 0.024 0.22254 ± 0.00144 3011 ± 35 2999 ± 10 –0.4</p><p>Older detrital zircons, arranged by ascending 207Pb*/206Pb* age: 2 35 35.1 89 233 2.71 0.044 1.682 ± 0.022 0.22814 ± 0.00127 1.683 ± 0.022 0.22775 ± 0.00133 3006 ± 31 3036 ± 9 1.0 2 22 22.1 100 45 0.47 0.087 1.689 ± 0.024 0.22866 ± 0.00135 1.690 ± 0.024 0.22789 ± 0.00136 2996 ± 34 3037 ± 10 1.4 2 31 31.1 63 39 0.65 0.086 1.609 ± 0.025 0.22865 ± 0.00165 1.610 ± 0.025 0.22789 ± 0.00179 3114 ± 38 3037 ± 13 –2.5 2 9 9.1 166 91 0.57 0.036 1.731 ± 0.023 0.22835 ± 0.00106 1.732 ± 0.023 0.22804 ± 0.00108 2938 ± 32 3038 ± 8 3.3 2 23 23.1 94 41 0.45 0.080 1.685 ± 0.024 0.22877 ± 0.00141 1.687 ± 0.024 0.22806 ± 0.00145 3001 ± 35 3038 ± 10 1.2 2 34 34.1 90 77 0.89 –0.015 1.632 ± 0.021 0.22881 ± 0.00124 1.632 ± 0.021 0.22894 ± 0.00125 3082 ± 32 3045 ± 9 –1.2 2 51 51.1 140 96 0.70 0.054 1.735 ± 0.021 0.22959 ± 0.00098 1.736 ± 0.021 0.22911 ± 0.00100 2933 ± 29 3046 ± 7 3.7 2 15 15.1 72 29 0.42 0.019 1.710 ± 0.026 0.23089 ± 0.00161 1.710 ± 0.026 0.23073 ± 0.00163 2968 ± 36 3057 ± 11 2.9 2 7 7.1 151 111 0.76 0.107 1.650 ± 0.023 0.23444 ± 0.00112 1.652 ± 0.023 0.23349 ± 0.00117 3052 ± 34 3076 ± 8 0.8 2 16 16.1 131 64 0.50 0.010 1.684 ± 0.023 0.23558 ± 0.00117 1.684 ± 0.023 0.23550 ± 0.00120 3005 ± 33 3090 ± 8 2.8 2 24 24.1 186 113 0.63 0.016 1.675 ± 0.022 0.23631 ± 0.00101 1.675 ± 0.022 0.23617 ± 0.00105 3018 ± 32 3094 ± 7 2.5 2 46 46.1 83 62 0.77 0.049 1.690 ± 0.022 0.24005 ± 0.00135 1.691 ± 0.022 0.23962 ± 0.00137 2995 ± 31 3117 ± 9 3.9 2 20 20.1 109 62 0.59 0.055 1.615 ± 0.023 0.24380 ± 0.00131 1.616 ± 0.023 0.24332 ± 0.00135 3105 ± 35 3142 ± 9 1.2 2 33 33.1 74 58 0.81 0.028 1.586 ± 0.021 0.24670 ± 0.00141 1.586 ± 0.021 0.24645 ± 0.00142 3151 ± 34 3162 ± 9 0.3 2 30 30.1 188 62 0.34 0.070 1.612 ± 0.021 0.24719 ± 0.00103 1.613 ± 0.021 0.24657 ± 0.00106 3110 ± 33 3163 ± 7 1.7 2 40 40.1 158 75 0.49 0.010 1.568 ± 0.019 0.24694 ± 0.00097 1.568 ± 0.019 0.24685 ± 0.00098 3180 ± 30 3165 ± 6 –0.5 2 52 52.1 70 62 0.91 0.004 1.667 ± 0.023 0.24787 ± 0.00142 1.667 ± 0.023 0.24784 ± 0.00144 3029 ± 34 3171 ± 9 4.5 2 6 6.1 31 20 0.68 0.380 1.560 ± 0.029 0.25186 ± 0.00251 1.566 ± 0.029 0.24853 ± 0.00300 3184 ± 47 3175 ± 19 –0.3 2 11 11.1 113 106 0.97 0.022 1.601 ± 0.023 0.24965 ± 0.00138 1.601 ± 0.023 0.24945 ± 0.00143 3128 ± 35 3181 ± 9 1.7 2 50 50.1 101 61 0.63 0.052 1.531 ± 0.019 0.25410 ± 0.00123 1.532 ± 0.019 0.25364 ± 0.00126 3240 ± 32 3208 ± 8 –1.0 2 17 17.1 105 74 0.72 0.118 1.562 ± 0.022 0.25795 ± 0.00138 1.564 ± 0.022 0.25691 ± 0.00144 3186 ± 36 3228 ± 9 1.3 2 39 39.1 58 90 1.59 0.136 1.548 ± 0.027 0.25930 ± 0.00166 1.551 ± 0.027 0.25811 ± 0.00172 3208 ± 44 3235 ± 10 0.8 2 5 5.1 101 44 0.45 0.115 1.516 ± 0.022 0.26345 ± 0.00142 1.518 ± 0.022 0.26244 ± 0.00150 3263 ± 37 3261 ± 9 0.0 2 47 47.1 146 128 0.91 0.081 1.479 ± 0.018 0.27948 ± 0.00106 1.480 ± 0.018 0.27878 ± 0.00110 3328 ± 31 3356 ± 6 0.8 2 8 8.1 110 68 0.63 0.087 1.441 ± 0.020 0.29064 ± 0.00139 1.443 ± 0.020 0.28990 ± 0.00143 3395 ± 37 3417 ± 8 0.7 2 37 37.1 101 73 0.75 0.005 1.428 ± 0.018 0.29022 ± 0.00131 1.428 ± 0.018 0.29018 ± 0.00131 3422 ± 34 3419 ± 7 –0.1 2 48 48.1 60 28 0.49 0.175 1.394 ± 0.020 0.29723 ± 0.00168 1.396 ± 0.020 0.29573 ± 0.00179 3482 ± 38 3448 ± 9 –1.0 2 21 21.1 156 147 0.98 0.246 1.475 ± 0.020 0.30523 ± 0.00125 1.479 ± 0.020 0.30313 ± 0.00133 3330 ± 35 3486 ± 7 4.5 2 1 1.1 65 31 0.50 0.021 1.464 ± 0.022 0.30371 ± 0.00187 1.465 ± 0.022 0.30353 ± 0.00192 3355 ± 40 3488 ± 10 3.8 2 56 56.1 117 34 0.30 0.020 1.358 ± 0.016 0.30456 ± 0.00157 1.358 ± 0.016 0.30439 ± 0.00158 3556 ± 33 3493 ± 8 –1.8 2 58 58.1 93 54 0.60 0.058 1.327 ± 0.016 0.30860 ± 0.00125 1.328 ± 0.017 0.30811 ± 0.00127 3618 ± 34 3511 ± 6 –3.0 2 53 53.1 30 21 0.72 0.206 1.408 ± 0.026 0.31046 ± 0.00236 1.411 ± 0.026 0.30872 ± 0.00249 3453 ± 49 3515 ± 12 1.7 2 19 19.1 95 39 0.42 0.054 1.426 ± 0.020 0.30953 ± 0.00156 1.426 ± 0.020 0.30908 ± 0.00159 3425 ± 38 3516 ± 8 2.6 2 2 2.1 48 45 0.97 0.031 1.407 ± 0.023 0.30947 ± 0.00219 1.408 ± 0.023 0.30921 ± 0.00221 3460 ± 44 3517 ± 11 1.6 2 44 44.1 177 132 0.77 0.127 1.421 ± 0.022 0.31170 ± 0.00107 1.423 ± 0.022 0.31062 ± 0.00111 3431 ± 41 3524 ± 6 2.6 2 38 38.1 98 130 1.37 0.074 1.366 ± 0.017 0.31181 ± 0.00137 1.367 ± 0.017 0.31119 ± 0.00142 3539 ± 35 3527 ± 7 –0.3 2 4 4.1 56 49 0.91 0.167 1.354 ± 0.022 0.31300 ± 0.00206 1.357 ± 0.022 0.31159 ± 0.00213 3560 ± 44 3529 ± 11 –0.9 2 12 12.1 103 64 0.64 0.047 1.386 ± 0.020 0.31233 ± 0.00150 1.386 ± 0.020 0.31193 ± 0.00152 3501 ± 38 3530 ± 8 0.8 2 42 42.1 111 65 0.60 0.028 1.375 ± 0.017 0.31368 ± 0.00133 1.375 ± 0.017 0.31345 ± 0.00133 3523 ± 34 3538 ± 7 0.4 2 60 60.1 74 58 0.82 0.058 1.362 ± 0.018 0.31450 ± 0.00142 1.363 ± 0.018 0.31401 ± 0.00145 3547 ± 35 3541 ± 7 –0.2 2 41 41.1 68 44 0.66 0.154 1.360 ± 0.019 0.31544 ± 0.00168 1.362 ± 0.019 0.31414 ± 0.00173 3549 ± 38 3541 ± 8 –0.2 2 43 43.1 75 51 0.71 0.035 1.397 ± 0.019 0.31453 ± 0.00163 1.398 ± 0.019 0.31423 ± 0.00166 3479 ± 37 3542 ± 8 1.8 2 13 13.1 181 110 0.63 0.007 1.405 ± 0.019 0.31505 ± 0.00116 1.405 ± 0.019 0.31499 ± 0.00117 3464 ± 36 3546 ± 6 2.3 2 49 49.1 27 20 0.78 0.257 1.348 ± 0.024 0.31737 ± 0.00261 1.351 ± 0.024 0.31520 ± 0.00273 3571 ± 49 3547 ± 13 –0.7 2 55 55.1 114 59 0.54 –0.002 1.372 ± 0.017 0.31522 ± 0.00120 1.372 ± 0.017 0.31524 ± 0.00120 3529 ± 33 3547 ± 6 0.5 2 45 45.1 63 45 0.73 0.081 1.391 ± 0.020 0.31595 ± 0.00178 1.392 ± 0.020 0.31527 ± 0.00178 3489 ± 38 3547 ± 9 1.6 2 29 29.1 24 20 0.87 0.113 1.415 ± 0.028 0.31623 ± 0.00318 1.416 ± 0.028 0.31527 ± 0.00324 3444 ± 53 3547 ± 16 2.9 2 10 10.1 117 118 1.05 0.039 1.381 ± 0.028 0.31571 ± 0.00142 1.382 ± 0.028 0.31538 ± 0.00145 3510 ± 55 3547 ± 7 1.1 2 36 36.1 179 103 0.59 0.016 1.362 ± 0.016 0.31605 ± 0.00104 1.362 ± 0.016 0.31591 ± 0.00104 3548 ± 32 3550 ± 5 0.0 2 28 28.1 56 40 0.75 0.040 1.415 ± 0.022 0.31640 ± 0.00207 1.415 ± 0.022 0.31607 ± 0.00207 3445 ± 42 3551 ± 10 3.0 2 26 26.1 110 80 0.75 0.150 1.363 ± 0.019 0.31828 ± 0.00146 1.365 ± 0.019 0.31702 ± 0.00153 3544 ± 38 3555 ± 7 0.3 2 54 54.1 55 16 0.29 –0.022 1.373 ± 0.019 0.31708 ± 0.00175 1.373 ± 0.019 0.31727 ± 0.00175 3528 ± 38 3557 ± 8 0.8 2 32 32.1 85 71 0.86 0.035 1.354 ± 0.018 0.32044 ± 0.00150 1.354 ± 0.018 0.32014 ± 0.00152 3565 ± 36 3571 ± 7 0.2 2 25 25.1 176 83 0.49 0.057 1.365 ± 0.018 0.32607 ± 0.00118 1.365 ± 0.018 0.32559 ± 0.00121 3542 ± 36 3596 ± 6 1.5 2 14 14.1 81 62 0.79 0.102 1.355 ± 0.021 0.32656 ± 0.00175 1.357 ± 0.021 0.32571 ± 0.00179 3560 ± 43 3597 ± 8 1.0 2 18 18.1 189 178 0.97 0.056 1.374 ± 0.019 0.32662 ± 0.00114 1.375 ± 0.019 0.32616 ± 0.00115 3523 ± 37 3599 ± 5 2.1 2 57 57.1 48 49 1.04 –0.009 1.345 ± 0.019 0.32685 ± 0.00178 1.345 ± 0.019 0.32693 ± 0.00178 3584 ± 39 3603 ± 8 0.5 2 59 59.1 105 54 0.53 0.009 1.377 ± 0.017 0.32723 ± 0.00127 1.377 ± 0.017 0.32715 ± 0.00128 3519 ± 33 3604 ± 6 2.3 2 3 3.1 38 21 0.56 0.131 1.342 ± 0.024 0.32865 ± 0.00261 1.344 ± 0.024 0.32756 ± 0.00282 3586 ± 49 3606 ± 13 0.5 Table A2.3. Ion microprobe analytical results for zircons from sample GSWA 169199</p><p>Grp Spot Grain 238U 232Th 232Th f204 238U/206Pb 207Pb/206Pb 238U/206Pb* 207Pb*/206Pb* 238U/206Pb* 207Pb*/206Pb* Disc no. no. .spot (ppm) (ppm) /238U (%) ±1 ±1 ±1 ±1 date (Ma) ±1 date (Ma) ±1 (%)</p><p>Youngest group of detrital zircons, arranged by ascending 207Pb*/206Pb* age: 1 4 4.1 162 312 1.99 0.125 1.568 ± 0.024 0.26626 ± 0.00118 1.570 ± 0.024 0.26517 ± 0.00122 3177 ± 38 3278 ± 7 3.1 1 9 9.1 97 76 0.81 0.123 1.506 ± 0.021 0.26697 ± 0.00147 1.508 ± 0.021 0.26589 ± 0.00153 3280 ± 36 3282 ± 9 0.1 1 16 16.1 52 15 0.29 0.031 1.516 ± 0.024 0.26840 ± 0.00208 1.517 ± 0.024 0.26813 ± 0.00208 3265 ± 41 3295 ± 12 0.9 1 22 22.1 191 108 0.58 0.284 1.601 ± 0.021 0.27134 ± 0.00114 1.605 ± 0.022 0.26888 ± 0.00123 3122 ± 33 3299 ± 7 5.4 1 25 25.1 88 213 2.51 0.002 1.522 ± 0.023 0.26923 ± 0.00158 1.523 ± 0.023 0.26922 ± 0.00159 3255 ± 39 3301 ± 9 1.4</p><p>Older detrital zircons, arranged by ascending 207Pb*/206Pb* age: 2 18 18.1 66 31 0.49 0.143 1.399 ± 0.023 0.27769 ± 0.00184 1.401 ± 0.023 0.27645 ± 0.00185 3473 ± 43 3343 ± 10 –3.9 2 10 10.1 63 53 0.86 0.191 1.445 ± 0.022 0.28987 ± 0.00192 1.448 ± 0.022 0.28823 ± 0.00199 3386 ± 40 3408 ± 11 0.7 2 33 33.1 141 14 0.10 0.136 1.566 ± 0.021 0.29240 ± 0.00131 1.568 ± 0.021 0.29123 ± 0.00135 3181 ± 33 3424 ± 7 7.1 2 5 5.1 90 102 1.17 0.080 1.423 ± 0.020 0.29462 ± 0.00160 1.425 ± 0.020 0.29394 ± 0.00163 3428 ± 38 3439 ± 9 0.3 2 36 36.1 17 10 0.59 0.493 1.425 ± 0.035 0.30023 ± 0.00371 1.432 ± 0.035 0.29602 ± 0.00417 3415 ± 65 3450 ± 22 1.0 2 2 2.1 90 93 1.06 0.105 1.396 ± 0.020 0.29715 ± 0.00163 1.398 ± 0.020 0.29625 ± 0.00166 3479 ± 38 3451 ± 9 –0.8 2 15 15.1 98 26 0.27 0.030 1.418 ± 0.020 0.29929 ± 0.00157 1.419 ± 0.020 0.29903 ± 0.00158 3439 ± 37 3465 ± 8 0.8 2 27 27.1 56 28 0.52 0.074 1.375 ± 0.023 0.30563 ± 0.00206 1.376 ± 0.023 0.30500 ± 0.00210 3521 ± 45 3496 ± 11 –0.7 2 29 29.1 130 95 0.76 0.040 1.365 ± 0.018 0.30598 ± 0.00137 1.366 ± 0.018 0.30564 ± 0.00138 3542 ± 37 3499 ± 7 –1.2 2 19 19.1 76 55 0.74 0.055 1.363 ± 0.020 0.31254 ± 0.00182 1.363 ± 0.020 0.31207 ± 0.00184 3546 ± 40 3531 ± 9 –0.4 2 1 1.1 142 117 0.85 0.034 1.370 ± 0.018 0.31237 ± 0.00133 1.370 ± 0.018 0.31208 ± 0.00134 3532 ± 36 3531 ± 7 0.0 2 14 14.1 96 65 0.70 –0.035 1.386 ± 0.019 0.31251 ± 0.00160 1.385 ± 0.020 0.31281 ± 0.00171 3503 ± 38 3535 ± 8 0.9 2 20 20.1 168 121 0.74 –0.005 1.361 ± 0.018 0.31318 ± 0.00123 1.360 ± 0.018 0.31322 ± 0.00123 3552 ± 36 3537 ± 6 –0.4 2 17 17.1 88 59 0.70 0.055 1.380 ± 0.020 0.31456 ± 0.00170 1.381 ± 0.020 0.31410 ± 0.00171 3512 ± 39 3541 ± 8 0.8 2 30 30.1 45 39 0.89 0.097 1.363 ± 0.022 0.31589 ± 0.00232 1.364 ± 0.022 0.31507 ± 0.00239 3545 ± 44 3546 ± 12 0.0 2 21 21.1 81 74 0.94 0.056 1.401 ± 0.022 0.31559 ± 0.00189 1.402 ± 0.022 0.31512 ± 0.00191 3470 ± 41 3546 ± 9 2.1 2 28 28.1 93 74 0.82 0.073 1.380 ± 0.019 0.31598 ± 0.00163 1.381 ± 0.019 0.31537 ± 0.00165 3512 ± 38 3547 ± 8 1.0 2 12 12.1 33 15 0.47 0.357 1.404 ± 0.028 0.31876 ± 0.00280 1.409 ± 0.028 0.31576 ± 0.00300 3457 ± 53 3549 ± 15 2.6 2 6 6.1 66 49 0.76 0.131 1.377 ± 0.021 0.31733 ± 0.00196 1.379 ± 0.021 0.31622 ± 0.00204 3515 ± 41 3552 ± 10 1.0 2 32 32.1 40 18 0.47 0.125 1.391 ± 0.023 0.31790 ± 0.00246 1.393 ± 0.023 0.31685 ± 0.00250 3488 ± 45 3555 ± 12 1.9 2 11 11.1 74 88 1.23 0.129 1.348 ± 0.020 0.31872 ± 0.00210 1.349 ± 0.020 0.31764 ± 0.00214 3575 ± 41 3558 ± 10 –0.5 2 13 13.1 66 36 0.57 0.035 1.344 ± 0.020 0.31993 ± 0.00192 1.344 ± 0.020 0.31964 ± 0.00194 3585 ± 41 3568 ± 9 –0.5 2 3 3.1 109 40 0.38 0.026 1.362 ± 0.019 0.32168 ± 0.00151 1.362 ± 0.019 0.32146 ± 0.00151 3548 ± 37 3577 ± 7 0.8 2 26 26.1 158 124 0.81 0.059 1.358 ± 0.018 0.32393 ± 0.00129 1.358 ± 0.018 0.32344 ± 0.00130 3556 ± 36 3586 ± 6 0.8 2 35 35.1 61 44 0.75 –0.018 1.376 ± 0.021 0.32675 ± 0.00206 1.375 ± 0.021 0.32690 ± 0.00206 3523 ± 41 3603 ± 10 2.2 2 8 8.1 76 38 0.52 0.078 1.333 ± 0.019 0.33675 ± 0.00258 1.334 ± 0.019 0.33610 ± 0.00260 3607 ± 40 3645 ± 12 1.1</p><p>Discarded analyses (discordance > 10%), arranged by increasing discordance: D 24 24.1 123 51 0.43 0.203 1.623 ± 0.022 0.31256 ± 0.00154 1.627 ± 0.022 0.31085 ± 0.00159 3089 ± 33 3525 ± 8 12.4 D 34 34.1 145 101 0.72 0.569 2.245 ± 0.030 0.24984 ± 0.00139 2.258 ± 0.030 0.24483 ± 0.00167 2363 ± 26 3152 ± 11 25.0 D 23 23.1 133 61 0.48 1.078 2.241 ± 0.031 0.27572 ± 0.00209 2.265 ± 0.031 0.26634 ± 0.00284 2357 ± 27 3285 ± 17 28.2 D 7 7.1 275 110 0.41 0.704 2.841 ± 0.039 0.31159 ± 0.00124 2.861 ± 0.039 0.30561 ± 0.00175 1932 ± 23 3499 ± 9 44.8 D 31 31.1 70 32 0.47 0.752 2.952 ± 0.045 0.29540 ± 0.00285 2.975 ± 0.046 0.28894 ± 0.00335 1868 ± 25 3412 ± 18 45.2 Table A2.4. Ion microprobe analytical results for zircons from sample GSWA 169200</p><p>Grp Spot Grain 238U 232Th 232Th f204 238U/206Pb 207Pb/206Pb 238U/206Pb* 207Pb*/206Pb* 238U/206Pb* 207Pb*/206Pb* Disc no. no. .spot (ppm) (ppm) /238U (%) ±1 ±1 ±1 ±1 date (Ma) ±1 date (Ma) ±1 (%)</p><p>Youngest group of detrital zircons, arranged by ascending 207Pb*/206Pb* age: 1 34 29.3 95 54 0.59 0.526 1.858 ± 0.031 0.21871 ± 0.00150 1.868 ± 0.032 0.21403 ± 0.00182 2764 ± 38 2936 ± 14 5.9 1 29 29.1 83 40 0.50 0.518 1.754 ± 0.035 0.22032 ± 0.00202 1.763 ± 0.036 0.21571 ± 0.00246 2896 ± 47 2949 ± 18 1.8</p><p>Older detrital zircons, arranged by ascending 207Pb*/206Pb* age: 2 16 16.1 125 150 1.25 0.311 1.671 ± 0.029 0.22288 ± 0.00162 1.676 ± 0.029 0.22012 ± 0.00181 3016 ± 42 2982 ± 13 –1.2 2 32 16.2 131 152 1.20 0.513 1.667 ± 0.027 0.22645 ± 0.00120 1.676 ± 0.027 0.22191 ± 0.00144 3017 ± 39 2995 ± 10 –0.7 2 27 27.1 150 85 0.59 0.355 1.670 ± 0.030 0.22893 ± 0.00158 1.676 ± 0.030 0.22579 ± 0.00183 3016 ± 44 3022 ± 13 0.2 2 26 26.1 66 36 0.57 0.643 1.645 ± 0.033 0.24199 ± 0.00243 1.656 ± 0.033 0.23631 ± 0.00346 3046 ± 49 3095 ± 23 1.6 2 8 8.1 123 47 0.40 0.249 1.603 ± 0.029 0.25103 ± 0.00165 1.607 ± 0.029 0.24884 ± 0.00176 3119 ± 44 3177 ± 11 1.9 2 19 19.1 40 106 2.75 1.283 1.436 ± 0.035 0.27993 ± 0.00316 1.454 ± 0.036 0.26878 ± 0.00403 3373 ± 65 3299 ± 24 –2.3 2 22 22.1 50 16 0.34 0.912 1.482 ± 0.031 0.28470 ± 0.00286 1.496 ± 0.032 0.27681 ± 0.00387 3300 ± 55 3345 ± 22 1.4 2 20 20.1 65 73 1.18 0.251 1.471 ± 0.041 0.27975 ± 0.00247 1.474 ± 0.041 0.27758 ± 0.00263 3338 ± 72 3349 ± 15 0.3 2 10 10.1 136 70 0.54 0.169 1.493 ± 0.025 0.28131 ± 0.00165 1.496 ± 0.025 0.27985 ± 0.00170 3300 ± 43 3362 ± 9 1.8 2 18 18.1 111 101 0.95 0.594 1.517 ± 0.027 0.28508 ± 0.00197 1.526 ± 0.027 0.27994 ± 0.00223 3249 ± 45 3363 ± 12 3.4 2 9 9.1 118 43 0.38 0.203 1.479 ± 0.025 0.28191 ± 0.00175 1.482 ± 0.025 0.28016 ± 0.00187 3324 ± 44 3364 ± 10 1.2 2 25 25.1 149 130 0.90 0.008 1.511 ± 0.027 0.28187 ± 0.00170 1.511 ± 0.027 0.28180 ± 0.00179 3274 ± 46 3373 ± 10 2.9 2 5 5.1 78 44 0.58 0.606 1.429 ± 0.026 0.29265 ± 0.00213 1.438 ± 0.026 0.28744 ± 0.00279 3404 ± 48 3404 ± 15 0.0 2 17 17.1 73 60 0.84 0.527 1.459 ± 0.028 0.29207 ± 0.00319 1.467 ± 0.028 0.28754 ± 0.00343 3351 ± 50 3404 ± 19 1.6 2 13 13.1 44 25 0.60 0.752 1.416 ± 0.030 0.29584 ± 0.00310 1.427 ± 0.030 0.28939 ± 0.00355 3425 ± 57 3414 ± 19 –0.3 2 11 11.1 149 72 0.50 0.087 1.438 ± 0.024 0.29073 ± 0.00162 1.439 ± 0.024 0.28998 ± 0.00164 3401 ± 44 3417 ± 9 0.5 2 21 21.1 46 28 0.63 0.628 1.360 ± 0.032 0.29756 ± 0.00302 1.369 ± 0.032 0.29218 ± 0.00361 3536 ± 64 3429 ± 19 –3.1 2 31 31.1 79 46 0.60 0.686 1.370 ± 0.029 0.30705 ± 0.00262 1.380 ± 0.029 0.30121 ± 0.00295 3514 ± 57 3476 ± 15 –1.1 2 7 7.1 34 17 0.52 0.361 1.401 ± 0.031 0.30605 ± 0.00330 1.406 ± 0.031 0.30298 ± 0.00366 3463 ± 60 3486 ± 19 0.6 2 4 4.1 112 23 0.21 0.231 1.406 ± 0.024 0.31494 ± 0.00185 1.410 ± 0.024 0.31299 ± 0.00200 3456 ± 46 3536 ± 10 2.2 2 24 24.1 159 47 0.31 0.247 1.350 ± 0.024 0.31529 ± 0.00171 1.354 ± 0.024 0.31321 ± 0.00179 3566 ± 48 3537 ± 9 –0.8 2 28 28.1 114 41 0.37 0.395 1.382 ± 0.024 0.31899 ± 0.00209 1.387 ± 0.025 0.31566 ± 0.00224 3500 ± 48 3549 ± 11 1.4 2 2 2.1 165 124 0.77 0.279 1.373 ± 0.022 0.31804 ± 0.00150 1.376 ± 0.022 0.31570 ± 0.00157 3521 ± 44 3549 ± 8 0.8 2 12 12.1 66 32 0.50 0.201 1.389 ± 0.026 0.31909 ± 0.00249 1.392 ± 0.026 0.31740 ± 0.00258 3490 ± 51 3557 ± 13 1.9 2 14 14.1 107 66 0.64 0.251 1.372 ± 0.024 0.32165 ± 0.00205 1.375 ± 0.024 0.31954 ± 0.00220 3522 ± 48 3568 ± 11 1.3 2 30 30.1 134 79 0.61 0.436 1.363 ± 0.024 0.32885 ± 0.00194 1.369 ± 0.024 0.32521 ± 0.00207 3534 ± 47 3595 ± 10 1.7 2 6 6.1 147 142 1.00 0.219 1.346 ± 0.022 0.32715 ± 0.00166 1.348 ± 0.022 0.32533 ± 0.00167 3576 ± 45 3595 ± 8 0.5 2 1 1.1 260 152 0.60 0.684 1.440 ± 0.024 0.33119 ± 0.00119 1.450 ± 0.024 0.32548 ± 0.00143 3381 ± 44 3596 ± 7 6.0 2 15 15.1 109 128 1.21 0.259 1.278 ± 0.024 0.34611 ± 0.00207 1.281 ± 0.024 0.34399 ± 0.00215 3719 ± 53 3681 ± 10 –1.0</p><p>Discarded analyses (discordance > 10% or f204 > 1.5%), arranged by increasing discordance: D 3 3.1 127 62 0.51 0.531 1.749 ± 0.029 0.28305 ± 0.00175 1.758 ± 0.030 0.27845 ± 0.00200 2903 ± 39 3354 ± 11 13.5 D 33 29.2 145 75 0.53 0.655 2.104 ± 0.033 0.22342 ± 0.00123 2.118 ± 0.034 0.21761 ± 0.00153 2493 ± 33 2963 ± 11 15.9 D 23 23.1 215 122 0.59 1.467 2.521 ± 0.041 0.29640 ± 0.00177 2.558 ± 0.042 0.28377 ± 0.00250 2127 ± 30 3384 ± 14 37.1 D 35 29.4 137 57 0.43 2.048 2.975 ± 0.048 0.23189 ± 0.00148 3.037 ± 0.049 0.21371 ± 0.00271 1835 ± 26 2934 ± 20 37.5 Table A2.5. Ion microprobe analytical results for zircons from sample GSWA 177131</p><p>Grp Spot Grain 238U 232Th 232Th f204 238U/206Pb 207Pb/206Pb 238U/206Pb* 207Pb*/206Pb* 238U/206Pb* 207Pb*/206Pb* Disc no. no. .spot (ppm) (ppm) /238U (%) ±1 ±1 ±1 ±1 date (Ma) ±1 date (Ma) ±1 (%)</p><p>Youngest group of detrital zircons, arranged by ascending 207Pb*/206Pb* age: 1 34 34.1 27 40 1.52 1.225 1.717 ± 0.042 0.22263 ± 0.00313 1.738 ± 0.043 0.21175 ± 0.00439 2930 ± 58 2919 ± 34 –0.4 1 5 5.1 88 151 1.78 0.474 1.794 ± 0.028 0.21808 ± 0.00282 1.803 ± 0.029 0.21387 ± 0.00311 2845 ± 37 2935 ± 24 3.1</p><p>Older detrital zircons, arranged by ascending 207Pb*/206Pb* age: 2 23 23.1 147 93 0.65 0.212 1.698 ± 0.030 0.22253 ± 0.00169 1.702 ± 0.030 0.22065 ± 0.00180 2980 ± 42 2985 ± 13 0.2 2 17 17.1 94 54 0.59 0.178 1.702 ± 0.032 0.22241 ± 0.00172 1.705 ± 0.032 0.22083 ± 0.00179 2976 ± 45 2987 ± 13 0.4 2 25 25.1 89 41 0.48 0.442 1.678 ± 0.032 0.23778 ± 0.00183 1.686 ± 0.032 0.23388 ± 0.00217 3002 ± 45 3079 ± 15 2.5 2 10 10.1 88 45 0.53 1.067 1.697 ± 0.023 0.24353 ± 0.00421 1.715 ± 0.024 0.23410 ± 0.00485 2961 ± 33 3080 ± 33 3.9 2 9 9.1 80 30 0.39 1.157 1.711 ± 0.025 0.24554 ± 0.00419 1.731 ± 0.025 0.23533 ± 0.00467 2939 ± 34 3089 ± 32 4.8 2 3 3.1 134 70 0.54 0.763 1.656 ± 0.019 0.25321 ± 0.00182 1.669 ± 0.019 0.24651 ± 0.00236 3027 ± 28 3162 ± 15 4.3 2 30 30.1 144 211 1.52 0.317 1.594 ± 0.028 0.24944 ± 0.00145 1.599 ± 0.028 0.24666 ± 0.00165 3132 ± 44 3163 ± 11 1.0 2 15 15.1 29 21 0.76 0.756 1.544 ± 0.036 0.25407 ± 0.00316 1.556 ± 0.037 0.24743 ± 0.00392 3200 ± 60 3168 ± 25 –1.0 2 26 26.1 100 62 0.64 0.476 1.605 ± 0.030 0.25261 ± 0.00173 1.613 ± 0.030 0.24843 ± 0.00196 3110 ± 46 3175 ± 13 2.0 2 27 27.1 41 235 5.95 1.135 1.555 ± 0.034 0.26236 ± 0.00278 1.573 ± 0.035 0.25241 ± 0.00356 3172 ± 55 3200 ± 22 0.9 2 19 19.1 135 83 0.64 0.329 1.547 ± 0.028 0.25545 ± 0.00148 1.552 ± 0.028 0.25257 ± 0.00162 3206 ± 45 3201 ± 10 –0.2 2 32 32.1 237 259 1.13 0.200 1.574 ± 0.027 0.25619 ± 0.00115 1.577 ± 0.027 0.25444 ± 0.00119 3166 ± 43 3213 ± 7 1.4 2 35 35.1 179 86 0.49 0.210 1.520 ± 0.026 0.26294 ± 0.00133 1.524 ± 0.027 0.26111 ± 0.00143 3253 ± 45 3253 ± 9 0.0 2 22 22.1 99 44 0.46 0.346 1.526 ± 0.028 0.26604 ± 0.00177 1.532 ± 0.029 0.26302 ± 0.00201 3240 ± 47 3265 ± 12 0.8 2 6 6.1 165 122 0.76 0.707 1.565 ± 0.019 0.27115 ± 0.00176 1.577 ± 0.019 0.26499 ± 0.00217 3166 ± 31 3277 ± 13 3.4 2 24 24.1 215 11 0.05 0.059 1.514 ± 0.026 0.26652 ± 0.00126 1.515 ± 0.026 0.26601 ± 0.00128 3267 ± 44 3283 ± 8 0.5 2 2 2.1 155 183 1.22 0.707 1.544 ± 0.017 0.27295 ± 0.00170 1.555 ± 0.017 0.26681 ± 0.00199 3201 ± 27 3287 ± 12 2.6 2 12 12.1 130 172 1.36 0.358 1.542 ± 0.028 0.27121 ± 0.00155 1.547 ± 0.028 0.26810 ± 0.00172 3213 ± 45 3295 ± 10 2.5 2 13 13.1 92 54 0.60 0.326 1.495 ± 0.028 0.27685 ± 0.00186 1.500 ± 0.028 0.27403 ± 0.00204 3293 ± 48 3329 ± 12 1.1 2 33 33.1 79 53 0.69 0.335 1.518 ± 0.029 0.27874 ± 0.00202 1.523 ± 0.029 0.27584 ± 0.00217 3254 ± 49 3340 ± 12 2.6 2 28 28.1 54 45 0.86 0.661 1.427 ± 0.029 0.29147 ± 0.00239 1.436 ± 0.030 0.28579 ± 0.00283 3407 ± 54 3395 ± 15 –0.4 2 20 20.1 65 34 0.54 0.555 1.451 ± 0.029 0.29723 ± 0.00230 1.459 ± 0.029 0.29248 ± 0.00257 3365 ± 52 3431 ± 14 1.9 2 8 8.1 101 52 0.53 0.903 1.435 ± 0.018 0.30661 ± 0.00218 1.448 ± 0.019 0.29891 ± 0.00257 3385 ± 34 3465 ± 13 2.3 2 18 18.1 236 177 0.78 0.273 1.439 ± 0.025 0.30257 ± 0.00125 1.443 ± 0.025 0.30024 ± 0.00132 3394 ± 45 3471 ± 7 2.2 2 31 31.1 256 32 0.13 0.152 1.405 ± 0.024 0.31104 ± 0.00119 1.407 ± 0.024 0.30975 ± 0.00122 3461 ± 45 3520 ± 6 1.7 2 16 16.1 138 54 0.41 0.183 1.383 ± 0.025 0.31370 ± 0.00163 1.385 ± 0.025 0.31216 ± 0.00168 3503 ± 48 3532 ± 8 0.8 2 21 21.1 95 30 0.33 0.266 1.391 ± 0.026 0.31738 ± 0.00192 1.394 ± 0.026 0.31514 ± 0.00201 3486 ± 50 3546 ± 10 1.7 2 29 29.1 67 31 0.47 0.775 1.357 ± 0.027 0.32974 ± 0.00237 1.367 ± 0.027 0.32326 ± 0.00274 3538 ± 54 3585 ± 13 1.3</p><p>Discarded analyses (discordance > 10% or f204 > 1.5%), arranged by increasing discordance: D 14 14.1 32 21 0.67 1.499 1.382 ± 0.032 0.31337 ± 0.00328 1.403 ± 0.033 0.30061 ± 0.00417 3468 ± 63 3473 ± 22 0.1 D 11 11.1 70 3 0.05 2.346 1.751 ± 0.027 0.23178 ± 0.00309 1.793 ± 0.029 0.21093 ± 0.00604 2858 ± 38 2913 ± 46 1.9 D 1 1.1 56 37 0.67 1.711 1.510 ± 0.025 0.28755 ± 0.00275 1.537 ± 0.026 0.27271 ± 0.00399 3231 ± 42 3322 ± 23 2.7 D 4 4.1 159 85 0.55 1.882 1.710 ± 0.018 0.29283 ± 0.00310 1.743 ± 0.020 0.27655 ± 0.00514 2923 ± 28 3344 ± 29 12.6 D 38 7.4 376 581 1.60 1.198 3.768 ± 0.063 0.12090 ± 0.00062 3.814 ± 0.064 0.11045 ± 0.00142 1501 ± 22 1807 ± 23 16.9 Table A2.6. Ion microprobe analytical results for zircons from sample GSWA 177252</p><p>Grp Spot Grain 238U 232Th 232Th f204 238U/206Pb 207Pb/206Pb 238U/206Pb* 207Pb*/206Pb* 238U/206Pb* 207Pb*/206Pb* Disc no. no. .spot (ppm) (ppm) /238U (%) ±1 ±1 ±1 ±1 date (Ma) ±1 date (Ma) ±1 (%)</p><p>Youngest detrital zircon: 1 28 28.1 107 52 0.50 0.106 1.676 ± 0.034 0.21975 ± 0.00163 1.678 ± 0.034 0.21881 ± 0.00170 3014 ± 48 2972 ± 13 –1.4</p><p>Older detrital zircons, arranged by ascending 207Pb*/206Pb* age: 2 37 37.1 141 18 0.13 –0.057 1.690 ± 0.033 0.23029 ± 0.00147 1.690 ± 0.033 0.23080 ± 0.00150 2997 ± 47 3058 ± 10 2.0 2 31 31.1 145 95 0.68 0.502 1.792 ± 0.035 0.23937 ± 0.00149 1.801 ± 0.035 0.23493 ± 0.00174 2847 ± 45 3086 ± 12 7.7 2 68 68.1 155 75 0.50 0.060 1.560 ± 0.031 0.26310 ± 0.00155 1.561 ± 0.031 0.26258 ± 0.00156 3192 ± 51 3262 ± 9 2.2 2 67 67.1 67 54 0.83 0.042 1.565 ± 0.033 0.26623 ± 0.00225 1.566 ± 0.033 0.26586 ± 0.00226 3183 ± 53 3282 ± 13 3.0 2 50 50.1 155 105 0.70 0.019 1.538 ± 0.030 0.26794 ± 0.00147 1.538 ± 0.030 0.26778 ± 0.00149 3229 ± 50 3293 ± 9 2.0 2 23 23.1 115 129 1.16 0.096 1.600 ± 0.032 0.26890 ± 0.00173 1.602 ± 0.032 0.26806 ± 0.00177 3127 ± 49 3295 ± 10 5.1 2 30 30.1 133 74 0.57 0.009 1.562 ± 0.031 0.26818 ± 0.00154 1.562 ± 0.031 0.26811 ± 0.00157 3190 ± 49 3295 ± 9 3.2 2 54 54.1 214 188 0.90 0.031 1.553 ± 0.030 0.26933 ± 0.00181 1.554 ± 0.030 0.26906 ± 0.00181 3203 ± 48 3301 ± 11 2.9 2 39 39.1 88 131 1.54 0.022 1.526 ± 0.031 0.26940 ± 0.00195 1.526 ± 0.031 0.26921 ± 0.00197 3248 ± 52 3301 ± 11 1.6 2 32 32.1 103 45 0.45 0.012 1.474 ± 0.030 0.26944 ± 0.00171 1.475 ± 0.030 0.26934 ± 0.00173 3337 ± 52 3302 ± 10 –1.1 2 33 33.1 171 253 1.53 –0.004 1.580 ± 0.031 0.26951 ± 0.00145 1.580 ± 0.031 0.26954 ± 0.00145 3161 ± 49 3303 ± 8 4.3 2 7 7.1 132 129 1.01 0.021 1.517 ± 0.030 0.27025 ± 0.00166 1.517 ± 0.030 0.27007 ± 0.00167 3264 ± 51 3306 ± 10 1.3 2 56 56.1 295 139 0.49 0.033 1.524 ± 0.029 0.27064 ± 0.00106 1.525 ± 0.029 0.27035 ± 0.00107 3251 ± 49 3308 ± 6 1.7 2 61 61.1 125 43 0.36 0.023 1.514 ± 0.030 0.27685 ± 0.00165 1.515 ± 0.030 0.27665 ± 0.00165 3268 ± 51 3344 ± 9 2.3 2 20 20.1 41 30 0.77 0.085 1.473 ± 0.033 0.27939 ± 0.00278 1.474 ± 0.033 0.27865 ± 0.00279 3338 ± 59 3355 ± 16 0.5 2 48 48.1 70 144 2.13 0.148 1.495 ± 0.032 0.28558 ± 0.00248 1.498 ± 0.032 0.28431 ± 0.00260 3297 ± 55 3387 ± 14 2.6 2 53 53.1 373 242 0.67 0.247 1.550 ± 0.029 0.28863 ± 0.00102 1.554 ± 0.029 0.28651 ± 0.00108 3202 ± 47 3399 ± 6 5.8 2 63 63.1 237 75 0.33 0.227 1.592 ± 0.030 0.29016 ± 0.00131 1.595 ± 0.030 0.28821 ± 0.00137 3137 ± 47 3408 ± 7 7.9 2 49 49.1 54 44 0.83 –0.016 1.467 ± 0.032 0.28893 ± 0.00260 1.467 ± 0.032 0.28906 ± 0.00260 3351 ± 57 3413 ± 14 1.8 2 45 45.1 24 10 0.42 0.055 1.427 ± 0.036 0.29102 ± 0.00376 1.428 ± 0.036 0.29054 ± 0.00381 3421 ± 66 3421 ± 20 0.0 2 59 59.1 65 138 2.18 0.262 1.472 ± 0.031 0.29394 ± 0.00238 1.476 ± 0.031 0.29170 ± 0.00256 3335 ± 55 3427 ± 14 2.7 2 17 17.1 126 61 0.50 0.023 1.461 ± 0.029 0.29398 ± 0.00160 1.461 ± 0.029 0.29378 ± 0.00161 3362 ± 52 3438 ± 8 2.2 2 12 12.1 244 132 0.56 0.109 1.529 ± 0.029 0.29530 ± 0.00118 1.531 ± 0.029 0.29436 ± 0.00121 3241 ± 48 3441 ± 6 5.8 2 4 4.1 56 41 0.76 –0.043 1.422 ± 0.033 0.29410 ± 0.00267 1.421 ± 0.033 0.29447 ± 0.00268 3434 ± 62 3441 ± 14 0.2 2 58 58.1 256 182 0.74 0.266 1.463 ± 0.028 0.29861 ± 0.00123 1.467 ± 0.028 0.29634 ± 0.00136 3351 ± 51 3451 ± 7 2.9 2 64 64.1 188 115 0.63 –0.015 1.444 ± 0.028 0.29641 ± 0.00143 1.444 ± 0.028 0.29654 ± 0.00144 3392 ± 51 3452 ± 8 1.7 2 36 36.1 135 144 1.10 0.011 1.412 ± 0.028 0.29665 ± 0.00176 1.412 ± 0.028 0.29655 ± 0.00177 3452 ± 52 3452 ± 9 0.0 2 26 26.1 30 24 0.82 0.088 1.410 ± 0.034 0.29815 ± 0.00330 1.411 ± 0.034 0.29740 ± 0.00333 3454 ± 64 3457 ± 17 0.1 2 71 71.1 150 76 0.52 –0.067 1.433 ± 0.028 0.29684 ± 0.00160 1.432 ± 0.028 0.29741 ± 0.00162 3415 ± 52 3457 ± 8 1.2 2 55 55.1 313 263 0.87 0.007 1.456 ± 0.027 0.29772 ± 0.00106 1.456 ± 0.027 0.29766 ± 0.00106 3370 ± 50 3458 ± 6 2.5 2 42 42.1 43 43 1.04 0.085 1.433 ± 0.032 0.29848 ± 0.00293 1.435 ± 0.032 0.29776 ± 0.00294 3410 ± 59 3459 ± 15 1.4 2 57 57.1 132 102 0.80 0.018 1.410 ± 0.028 0.29934 ± 0.00164 1.410 ± 0.028 0.29919 ± 0.00164 3456 ± 54 3466 ± 9 0.3 2 8 8.1 92 42 0.48 0.046 1.464 ± 0.030 0.29967 ± 0.00195 1.464 ± 0.030 0.29928 ± 0.00200 3355 ± 54 3467 ± 10 3.2 2 27 27.1 106 43 0.42 0.103 1.415 ± 0.029 0.30032 ± 0.00177 1.417 ± 0.029 0.29944 ± 0.00182 3443 ± 54 3467 ± 9 0.7 2 65 65.1 83 63 0.78 0.006 1.428 ± 0.029 0.29950 ± 0.00212 1.429 ± 0.029 0.29945 ± 0.00213 3421 ± 55 3467 ± 11 1.3 2 43 43.1 90 38 0.43 0.049 1.436 ± 0.029 0.30016 ± 0.00328 1.436 ± 0.029 0.29975 ± 0.00329 3406 ± 54 3469 ± 17 1.8 2 15 15.1 118 84 0.74 0.055 1.460 ± 0.030 0.30044 ± 0.00168 1.461 ± 0.030 0.29997 ± 0.00168 3362 ± 53 3470 ± 9 3.1 2 69 69.1 73 56 0.79 0.038 1.428 ± 0.030 0.30121 ± 0.00230 1.429 ± 0.030 0.30088 ± 0.00231 3421 ± 56 3475 ± 12 1.6 2 16 16.1 203 117 0.59 0.020 1.455 ± 0.028 0.30134 ± 0.00126 1.455 ± 0.028 0.30116 ± 0.00127 3373 ± 50 3476 ± 7 3.0 2 1 1.1 50 28 0.57 –0.158 1.512 ± 0.037 0.30037 ± 0.00256 1.509 ± 0.037 0.30172 ± 0.00256 3277 ± 64 3479 ± 13 5.8 2 5 5.1 51 58 1.19 –0.004 1.426 ± 0.032 0.30209 ± 0.00292 1.426 ± 0.032 0.30212 ± 0.00292 3425 ± 60 3481 ± 15 1.6 2 10 10.1 141 70 0.51 0.144 1.427 ± 0.028 0.30346 ± 0.00157 1.429 ± 0.028 0.30224 ± 0.00164 3420 ± 52 3482 ± 8 1.8 2 51 51.1 154 109 0.73 0.013 1.408 ± 0.027 0.30237 ± 0.00155 1.408 ± 0.027 0.30226 ± 0.00155 3459 ± 52 3482 ± 8 0.6 2 44 44.1 142 84 0.61 0.034 1.425 ± 0.028 0.30280 ± 0.00159 1.426 ± 0.028 0.30251 ± 0.00160 3426 ± 52 3483 ± 8 1.7 2 72 72.1 93 35 0.39 –0.060 1.480 ± 0.030 0.30209 ± 0.00203 1.479 ± 0.030 0.30260 ± 0.00205 3329 ± 53 3484 ± 10 4.4 2 41 41.1 102 46 0.47 –0.002 1.414 ± 0.028 0.30270 ± 0.00185 1.414 ± 0.028 0.30271 ± 0.00185 3449 ± 54 3484 ± 9 1.0 2 14 14.1 130 69 0.55 0.986 1.515 ± 0.030 0.31142 ± 0.00160 1.531 ± 0.030 0.30304 ± 0.00202 3241 ± 50 3486 ± 10 7.0 2 35 35.1 94 52 0.58 –0.022 1.426 ± 0.029 0.30311 ± 0.00195 1.426 ± 0.029 0.30330 ± 0.00195 3426 ± 54 3487 ± 10 1.8 2 25 25.1 85 60 0.73 –0.013 1.418 ± 0.030 0.30323 ± 0.00203 1.418 ± 0.030 0.30334 ± 0.00203 3440 ± 56 3487 ± 10 1.3 2 13 13.1 121 53 0.45 0.367 1.443 ± 0.029 0.30761 ± 0.00173 1.448 ± 0.029 0.30449 ± 0.00187 3385 ± 52 3493 ± 9 3.1 2 21 21.1 55 57 1.06 0.144 1.424 ± 0.030 0.30587 ± 0.00251 1.426 ± 0.031 0.30465 ± 0.00258 3426 ± 57 3494 ± 13 1.9 2 29 29.1 80 64 0.83 0.127 1.367 ± 0.028 0.30659 ± 0.00211 1.369 ± 0.028 0.30552 ± 0.00217 3535 ± 56 3498 ± 11 –1.0 2 70 70.1 144 47 0.34 0.000 1.410 ± 0.028 0.30563 ± 0.00161 1.410 ± 0.028 0.30563 ± 0.00161 3456 ± 53 3499 ± 8 1.2 2 18 18.1 68 38 0.58 –0.053 1.370 ± 0.030 0.30569 ± 0.00225 1.369 ± 0.030 0.30614 ± 0.00228 3535 ± 59 3502 ± 12 –1.0 2 9 9.1 201 65 0.33 0.023 1.386 ± 0.027 0.30824 ± 0.00129 1.386 ± 0.027 0.30805 ± 0.00130 3501 ± 53 3511 ± 7 0.3 2 22 22.1 152 122 0.83 0.009 1.496 ± 0.031 0.31084 ± 0.00432 1.496 ± 0.031 0.31077 ± 0.00433 3300 ± 53 3525 ± 21 6.4 2 34 34.1 138 85 0.64 –0.014 1.442 ± 0.028 0.31284 ± 0.00162 1.442 ± 0.028 0.31296 ± 0.00162 3396 ± 52 3536 ± 8 3.9 2 47 47.1 81 41 0.53 0.055 1.398 ± 0.028 0.31453 ± 0.00202 1.399 ± 0.028 0.31406 ± 0.00203 3477 ± 55 3541 ± 10 1.8 2 3 3.1 115 50 0.45 0.018 1.356 ± 0.028 0.31458 ± 0.00198 1.356 ± 0.028 0.31443 ± 0.00199 3561 ± 57 3543 ± 10 –0.5 2 2 2.1 172 94 0.57 0.011 1.370 ± 0.027 0.31871 ± 0.00159 1.370 ± 0.027 0.31862 ± 0.00159 3534 ± 55 3563 ± 8 0.8 2 52 52.1 283 261 0.95 0.018 1.468 ± 0.028 0.31991 ± 0.00123 1.468 ± 0.028 0.31975 ± 0.00124 3349 ± 50 3569 ± 6 6.1 2 11 11.1 71 43 0.63 0.107 1.372 ± 0.028 0.32187 ± 0.00221 1.374 ± 0.028 0.32097 ± 0.00225 3525 ± 56 3575 ± 11 1.4 2 62 62.1 65 34 0.54 0.125 1.366 ± 0.029 0.32345 ± 0.00296 1.368 ± 0.029 0.32240 ± 0.00301 3538 ± 58 3581 ± 14 1.2 2 19 19.1 19 9 0.51 0.080 1.329 ± 0.035 0.32536 ± 0.00438 1.330 ± 0.035 0.32469 ± 0.00444 3614 ± 73 3592 ± 21 –0.6 2 6 6.1 113 50 0.45 0.004 1.405 ± 0.029 0.32626 ± 0.00205 1.405 ± 0.029 0.32623 ± 0.00208 3464 ± 55 3599 ± 10 3.8 2 40 40.1 73 37 0.53 –0.001 1.356 ± 0.028 0.32682 ± 0.00229 1.356 ± 0.028 0.32682 ± 0.00229 3561 ± 57 3602 ± 11 1.1 2 66 66.1 175 73 0.43 0.041 1.341 ± 0.026 0.34225 ± 0.00155 1.342 ± 0.026 0.34191 ± 0.00155 3590 ± 53 3671 ± 7 2.2</p><p>Discarded analyses (discordance > 10% or f204 > 1.5%), arranged by increasing discordance: D 24 24.1 125 73 0.60 1.538 1.423 ± 0.028 0.31809 ± 0.00168 1.445 ± 0.029 0.30503 ± 0.00242 3390 ± 52 3496 ± 12 3.0 D 60 60.1 361 292 0.84 0.263 2.514 ± 0.047 0.27457 ± 0.00122 2.521 ± 0.048 0.27230 ± 0.00131 2154 ± 35 3319 ± 8 35.1 D 46 46.1 379 186 0.51 2.624 3.345 ± 0.064 0.31043 ± 0.00157 3.435 ± 0.067 0.28790 ± 0.00299 1647 ± 28 3406 ± 16 51.6 D 38 38.1 318 148 0.48 0.180 3.593 ± 0.068 0.30068 ± 0.00159 3.600 ± 0.068 0.29915 ± 0.00165 1580 ± 27 3466 ± 9 54.4 Table A2.7. Ion microprobe analytical results for zircons from sample GSWA 177254</p><p>Grp Spot Grain 238U 232Th 232Th f204 238U/206Pb 207Pb/206Pb 238U/206Pb* 207Pb*/206Pb* 238U/206Pb* 207Pb*/206Pb* Disc no. no. .spot (ppm) (ppm) /238U (%) ±1 ±1 ±1 ±1 date (Ma) ±1 date (Ma) ±1 (%)</p><p>Youngest detrital zircon: 1 26 26.1 343 105 0.32 0.043 1.827 ± 0.035 0.21994 ± 0.00109 1.828 ± 0.035 0.21955 ± 0.00110 2813 ± 43 2977 ± 8 5.5</p><p>Older detrital zircons, arranged by ascending 207Pb*/206Pb* age: 2 27 27.1 141 96 0.70 0.054 1.454 ± 0.029 0.26639 ± 0.00150 1.454 ± 0.029 0.26592 ± 0.00152 3373 ± 52 3282 ± 9 –2.8 2 14 14.1 258 274 1.10 0.068 1.526 ± 0.029 0.27205 ± 0.00118 1.527 ± 0.029 0.27146 ± 0.00120 3247 ± 49 3314 ± 7 2.0 2 10 10.1 196 158 0.83 0.253 1.474 ± 0.028 0.29201 ± 0.00137 1.478 ± 0.029 0.28983 ± 0.00146 3331 ± 50 3417 ± 8 2.5 2 30 30.1 108 26 0.25 0.110 1.440 ± 0.030 0.29151 ± 0.00185 1.442 ± 0.030 0.29056 ± 0.00186 3396 ± 54 3421 ± 10 0.7 2 1 1.1 145 107 0.76 0.067 1.587 ± 0.031 0.29165 ± 0.00169 1.588 ± 0.031 0.29108 ± 0.00173 3149 ± 49 3423 ± 9 8.0 2 9 9.1 135 72 0.55 0.163 1.483 ± 0.033 0.29255 ± 0.00166 1.485 ± 0.033 0.29116 ± 0.00172 3319 ± 58 3424 ± 9 3.1 2 4 4.1 220 72 0.34 0.031 1.474 ± 0.028 0.29194 ± 0.00125 1.474 ± 0.028 0.29167 ± 0.00127 3338 ± 50 3427 ± 7 2.6 2 22 22.1 135 93 0.71 0.052 1.431 ± 0.028 0.29314 ± 0.00169 1.432 ± 0.028 0.29270 ± 0.00171 3414 ± 53 3432 ± 9 0.5 2 5 5.1 112 58 0.53 0.078 1.436 ± 0.029 0.29387 ± 0.00181 1.438 ± 0.029 0.29320 ± 0.00184 3404 ± 53 3435 ± 10 0.9 2 18 18.1 293 164 0.58 0.007 1.474 ± 0.028 0.29342 ± 0.00115 1.474 ± 0.028 0.29336 ± 0.00115 3338 ± 49 3436 ± 6 2.8 2 24 24.1 117 102 0.90 0.034 1.451 ± 0.029 0.29368 ± 0.00179 1.452 ± 0.029 0.29338 ± 0.00181 3378 ± 53 3436 ± 10 1.7 2 15 15.1 214 106 0.51 0.024 1.465 ± 0.029 0.29513 ± 0.00153 1.465 ± 0.029 0.29493 ± 0.00154 3354 ± 51 3444 ± 8 2.6 2 20 20.1 91 49 0.56 0.181 1.597 ± 0.033 0.29880 ± 0.00213 1.600 ± 0.033 0.29726 ± 0.00221 3130 ± 51 3456 ± 12 9.4 2 13 13.1 57 38 0.70 0.005 1.442 ± 0.031 0.29796 ± 0.00255 1.442 ± 0.031 0.29792 ± 0.00258 3395 ± 57 3459 ± 13 1.9 2 28 28.1 135 131 1.00 0.087 1.486 ± 0.030 0.29924 ± 0.00166 1.487 ± 0.030 0.29850 ± 0.00170 3315 ± 53 3462 ± 9 4.2 2 8 8.1 105 55 0.54 –0.073 1.426 ± 0.029 0.29849 ± 0.00185 1.425 ± 0.029 0.29911 ± 0.00190 3427 ± 53 3466 ± 10 1.1 2 11 11.1 179 113 0.65 0.014 1.428 ± 0.028 0.29976 ± 0.00147 1.428 ± 0.028 0.29964 ± 0.00148 3422 ± 53 3468 ± 8 1.3 2 7 7.1 65 57 0.92 –0.018 1.483 ± 0.032 0.30078 ± 0.00247 1.483 ± 0.032 0.30093 ± 0.00247 3322 ± 55 3475 ± 13 4.4 2 19 19.1 359 252 0.72 0.176 1.580 ± 0.030 0.30422 ± 0.00113 1.582 ± 0.030 0.30272 ± 0.00117 3157 ± 48 3484 ± 6 9.4 2 2 2.1 89 99 1.16 0.016 1.444 ± 0.030 0.31289 ± 0.00234 1.445 ± 0.030 0.31275 ± 0.00237 3391 ± 54 3535 ± 12 4.1 2 3 3.1 244 85 0.36 0.634 1.542 ± 0.030 0.31914 ± 0.00134 1.552 ± 0.030 0.31379 ± 0.00156 3206 ± 49 3540 ± 8 9.4 2 6 6.1 490 91 0.19 0.195 1.479 ± 0.028 0.31546 ± 0.00094 1.481 ± 0.028 0.31382 ± 0.00098 3325 ± 49 3540 ± 5 6.1 2 23 23.1 145 187 1.33 0.069 1.408 ± 0.029 0.31686 ± 0.00184 1.409 ± 0.029 0.31628 ± 0.00186 3457 ± 55 3552 ± 9 2.7 2 29 29.1 29 19 0.68 0.079 1.298 ± 0.031 0.32078 ± 0.00350 1.299 ± 0.031 0.32012 ± 0.00354 3680 ± 67 3570 ± 17 –3.1 2 25 25.1 104 55 0.55 –0.065 1.370 ± 0.028 0.32037 ± 0.00199 1.369 ± 0.028 0.32092 ± 0.00201 3536 ± 55 3574 ± 10 1.1 2 16 16.1 293 193 0.68 0.005 1.399 ± 0.027 0.32099 ± 0.00121 1.399 ± 0.027 0.32095 ± 0.00121 3476 ± 51 3574 ± 6 2.8 2 17 17.1 197 130 0.68 0.721 1.375 ± 0.027 0.32755 ± 0.00146 1.385 ± 0.027 0.32151 ± 0.00172 3504 ± 53 3577 ± 8 2.0 2 12 12.1 105 33 0.32 0.004 1.434 ± 0.029 0.32177 ± 0.00200 1.434 ± 0.029 0.32173 ± 0.00201 3411 ± 53 3578 ± 10 4.7</p><p>Discarded analysis (discordance > 10%): D 21 21.1 147 72 0.51 0.050 2.732 ± 0.054 0.26787 ± 0.00213 2.734 ± 0.054 0.26744 ± 0.00217 2010 ± 34 3291 ± 13 38.9 Table A2.8. Ion microprobe analytical results for zircons from sample GSWA 178010</p><p>Grp Spot Grain 238U 232Th 232Th f204 238U/206Pb 207Pb/206Pb 238U/206Pb* 207Pb*/206Pb* 238U/206Pb* 207Pb*/206Pb* Disc no. no. .spot (ppm) (ppm) /238U (%) ±1 ±1 ±1 ±1 date (Ma) ±1 date (Ma) ±1 (%)</p><p>Youngest group of detrital zircons, arranged by ascending 207Pb*/206Pb* age: 1 9 9.1 114 158 1.44 0.089 1.471 ± 0.025 0.26781 ± 0.00152 1.472 ± 0.025 0.26704 ± 0.00156 3342 ± 44 3289 ± 9 –1.6 1 21 21.1 145 96 0.68 0.073 1.435 ± 0.062 0.26867 ± 0.00140 1.436 ± 0.062 0.26803 ± 0.00142 3407 ± 115 3295 ± 8 –3.4 1 24 24.1 143 237 1.72 0.550 1.627 ± 0.070 0.27297 ± 0.00149 1.636 ± 0.071 0.26818 ± 0.00170 3074 ± 105 3295 ± 10 6.7 1 27 27.1 74 125 1.74 0.208 1.427 ± 0.062 0.27134 ± 0.00200 1.430 ± 0.062 0.26954 ± 0.00211 3419 ± 116 3303 ± 12 –3.5</p><p>Older detrital zircons, arranged by ascending 207Pb*/206Pb* age: 2 1 1.1 97 143 1.53 0.035 1.447 ± 0.025 0.27324 ± 0.00162 1.448 ± 0.025 0.27293 ± 0.00163 3386 ± 46 3323 ± 9 –1.9 2 25 25.1 194 119 0.63 0.188 1.421 ± 0.061 0.28917 ± 0.00127 1.424 ± 0.061 0.28755 ± 0.00134 3429 ± 115 3404 ± 7 –0.7 2 5 5.1 190 110 0.60 0.220 1.463 ± 0.023 0.29203 ± 0.00120 1.466 ± 0.023 0.29013 ± 0.00127 3352 ± 41 3418 ± 7 1.9 2 12 12.1 117 58 0.51 0.093 1.355 ± 0.023 0.29126 ± 0.00150 1.356 ± 0.023 0.29046 ± 0.00157 3561 ± 46 3420 ± 8 –4.1 2 19 19.1 16 7 0.45 1.046 1.388 ± 0.066 0.29947 ± 0.00458 1.403 ± 0.067 0.29050 ± 0.00593 3470 ± 128 3420 ± 32 –1.4 2 8 8.1 124 168 1.40 0.291 1.532 ± 0.025 0.29441 ± 0.00150 1.536 ± 0.026 0.29192 ± 0.00162 3232 ± 42 3428 ± 9 5.7 2 2 2.1 62 29 0.48 0.079 1.360 ± 0.026 0.29354 ± 0.00206 1.361 ± 0.026 0.29287 ± 0.00206 3551 ± 52 3433 ± 11 –3.4 2 11 11.1 53 29 0.58 0.176 1.376 ± 0.028 0.29863 ± 0.00225 1.378 ± 0.028 0.29713 ± 0.00233 3517 ± 55 3455 ± 12 –1.8 2 3 3.1 139 151 1.12 0.060 1.366 ± 0.022 0.29767 ± 0.00137 1.366 ± 0.022 0.29716 ± 0.00139 3540 ± 44 3455 ± 7 –2.5 2 10 10.1 233 51 0.22 0.020 1.370 ± 0.021 0.29793 ± 0.00106 1.370 ± 0.021 0.29776 ± 0.00107 3533 ± 41 3459 ± 6 –2.2 2 16 16.1 123 123 1.04 0.073 1.377 ± 0.023 0.29930 ± 0.00148 1.378 ± 0.023 0.29867 ± 0.00155 3517 ± 46 3463 ± 8 –1.5 2 18 18.1 138 146 1.09 0.743 1.482 ± 0.024 0.30558 ± 0.00146 1.493 ± 0.025 0.29925 ± 0.00170 3305 ± 43 3466 ± 9 4.6 2 13 13.1 172 109 0.66 0.190 1.388 ± 0.022 0.30098 ± 0.00126 1.391 ± 0.022 0.29936 ± 0.00132 3492 ± 42 3467 ± 7 –0.7 2 6 6.1 165 60 0.38 0.039 1.372 ± 0.022 0.29985 ± 0.00129 1.373 ± 0.022 0.29952 ± 0.00130 3528 ± 43 3468 ± 7 –1.7 2 20 20.1 32 15 0.50 0.227 1.388 ± 0.063 0.30527 ± 0.00322 1.391 ± 0.063 0.30335 ± 0.00334 3491 ± 121 3487 ± 17 –0.1 2 17 17.1 99 38 0.39 0.290 1.355 ± 0.024 0.30605 ± 0.00165 1.359 ± 0.024 0.30359 ± 0.00179 3555 ± 48 3489 ± 9 –1.9 2 22 22.1 98 45 0.47 0.666 1.372 ± 0.060 0.30947 ± 0.00182 1.382 ± 0.060 0.30382 ± 0.00210 3510 ± 118 3490 ± 11 –0.6 2 26 26.1 79 33 0.44 0.125 1.329 ± 0.058 0.30630 ± 0.00206 1.331 ± 0.058 0.30523 ± 0.00212 3613 ± 121 3497 ± 11 –3.3 2 23 23.1 164 123 0.77 0.075 1.297 ± 0.056 0.32167 ± 0.00142 1.298 ± 0.056 0.32104 ± 0.00143 3682 ± 121 3575 ± 7 –3.0 2 14 14.1 147 101 0.71 0.078 1.311 ± 0.021 0.32624 ± 0.00142 1.312 ± 0.021 0.32558 ± 0.00145 3653 ± 45 3596 ± 7 –1.6 2 15 15.1 168 83 0.51 0.016 1.272 ± 0.020 0.35159 ± 0.00136 1.272 ± 0.020 0.35145 ± 0.00136 3738 ± 45 3713 ± 6 –0.7</p><p>Discarded analyses (discordance > 10% and f204 > 1.5%), arranged by increasing discordance: D 4 4.1 133 78 0.60 1.526 1.644 ± 0.027 0.33023 ± 0.00161 1.669 ± 0.028 0.31741 ± 0.00228 3026 ± 40 3557 ± 11 14.9 D 7 7.1 271 224 0.85 4.059 2.050 ± 0.031 0.33399 ± 0.00128 2.137 ± 0.033 0.29942 ± 0.00372 2475 ± 32 3467 ± 19 28.6</p>