"Table 1. SHRIMP U-Pb zircon data for sample EH8561, 206/8-8, 2303.97 m, Unit Ib",,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,, Total Ratios,,,,,, Radiogenic Ratios,,,,,,,,Age (Ma),, Grain.,,U,Th,Th/U,206Pb*,204Pb/,f206,,238U/,,207Pb/,,,206Pb/,,207Pb/,,207Pb/,,,,206Pb/,,207Pb/,,% spot,,(ppm),(ppm),,(ppm),206Pb,%,,206Pb,±,206Pb,±,,238U,±,235U,±,206Pb,±,r,,238U,±,206Pb,±,Disc 1.1,,703,555,0.79,93,0.000569,0.98,,6.52,0.079,0.2351,0.0013,,0.1519,0.0019,4.784,0.068,0.2285,0.0017,0.86,,911,10,3042,12,70 2.1,,67,32,0.48,13,0.000376,0.62,,4.43,0.092,0.0896,0.0018,,0.2243,0.0047,2.609,0.108,0.0843,0.003,0.508,,1305,25,1301,69,0 3.1,,1982,632,0.32,65,0.001929,4.09,,26.096,0.322,0.0835,0.0007,,0.0368,0.0005,,,,,,,233,3,,, 4.1,,514,124,0.24,162,0.000175,0.26,,2.724,0.031,0.1921,0.0008,,0.3661,0.0042,9.588,0.121,0.19,0.001,0.911,,2011,20,2742,9,27 5.1,,690,150,0.22,186,0.000012,0.02,,3.178,0.036,0.1073,0.0005,,0.3146,0.0036,4.648,0.058,0.1072,0.0005,0.914,,1763,18,1752,9,-1 6.1,,245,73,0.3,40,0.000046,0.08,,5.311,0.071,0.0775,0.001,,0.1882,0.0025,1.993,0.038,0.0768,0.0011,0.697,,1111,14,1117,27,0 7.1,,42,19,0.45,10,0.001069,1.71,,3.498,0.071,0.1077,0.0021,,0.2816,0.0062,3.67,0.193,0.0945,0.0036,0.761,,1599,31,1519,73,-5 8.1,,390,107,0.27,58,0.000117,0.2,,5.821,0.071,0.0742,0.0007,,0.1715,0.0021,1.715,0.032,0.0725,0.001,0.662,,1020,12,1001,28,-2 9.1,,481,90,0.19,74,0.000075,0.13,,5.575,0.067,0.0743,0.0006,,0.1795,0.0022,1.85,0.036,0.0747,0.0009,0.83,,1064,12,1062,23,0 10.1,,23,49,2.1,3,0.000605,1.04,,6.337,0.192,0.083,0.0034,,0.1562,0.0048,1.601,0.146,0.0744,0.0064,0.338,,935,27,1051,173,11 11.1,,114,86,0.76,7,0.001295,1.43,,13.998,0.25,0.0673,0.0019,,0.0704,0.0013,,,,,,,439,8,,, 12.1,,172,76,0.44,27, -,<0.01,,5.573,0.08,0.0739,0.0011,,0.1795,0.0026,1.833,0.038,0.0741,0.0011,0.705,,1064,14,1043,29,-2 13.1,,113,17,0.15,46,0.000023,0.03,,2.098,0.031,0.1913,0.0015,,0.4764,0.0071,12.546,0.212,0.191,0.0016,0.876,,2512,31,2751,13,9 14.1,,208,69,0.33,23,0.000845,1.48,,7.726,0.115,0.0844,0.0014,,0.1275,0.002,1.272,0.067,0.0723,0.0037,0.29,,774,11,995,103,22 15.1,,620,147,0.24,286,0.000027,0.04,,1.859,0.021,0.1988,0.0007,,0.5379,0.0061,14.719,0.174,0.1985,0.0007,0.959,,2774,26,2814,5,1 16.1,,66,48,0.74,5,0.000426,1.2,,12.151,0.27,0.0671,0.0024,,0.0813,0.0019,,,,,,,504,11,,, 17.1,,493,92,0.19,160,0.00026,0.39,,2.644,0.032,0.1952,0.0009,,0.3767,0.0045,9.971,0.134,0.192,0.0011,0.901,,2061,21,2759,10,25 18.1,,195,45,0.23,86, -,<0.01,,1.942,0.026,0.1843,0.0012,,0.515,0.0069,13.105,0.195,0.1845,0.0012,0.899,,2678,29,2694,11,1 19.1,,285,91,0.32,43,0.000096,0.16,,5.712,0.075,0.0723,0.0008,,0.1748,0.0023,1.709,0.036,0.0709,0.0012,0.626,,1038,13,955,33,-9 20.1,,139,49,0.35,25,0.000102,0.17,,4.803,0.073,0.0828,0.0012,,0.2078,0.0032,2.331,0.064,0.0813,0.0019,0.552,,1217,17,1230,45,1 21.1,,58,32,0.56,15,0.000081,0.13,,3.332,0.064,0.0984,0.0018,,0.2997,0.0058,4.022,0.111,0.0973,0.0019,0.697,,1690,29,1573,37,-7 22.1,,325,205,0.63,15, -,1.06,,18.759,0.269,0.0616,0.0013,,0.0527,0.0008,,,,,,,331,5,,, 23.1,,61,33,0.54,9, -,<0.01,,5.701,0.197,0.0983,0.0107,,0.1754,0.0061,2.378,0.271,0.0983,0.0107,0.303,,1042,33,1593,203,35 24.1,,488,30,0.06,119,0.000024,0.04,,3.525,0.043,0.0906,0.0007,,0.2838,0.0035,3.558,0.054,0.0909,0.0007,0.866,,1611,18,1445,15,100 25.1,,256,120,0.47,43, -,<0.01,,5.113,0.067,0.0755,0.0009,,0.1958,0.0028,2.064,0.065,0.0765,0.0017,0.802,,1153,15,1107,44,-4 26.1,,217,154,0.71,82,0.00017,0.24,,2.264,0.029,0.1909,0.0016,,0.4407,0.0058,11.474,0.182,0.1888,0.0017,0.821,,2354,26,2732,15,14 27.1,,455,121,0.27,102,0.000166,0.27,,3.832,0.045,0.1133,0.0007,,0.2602,0.0031,3.985,0.061,0.111,0.0011,0.782,,1491,16,1817,17,18 28.1,,371,148,0.4,95,0.000022,0.03,,3.344,0.043,0.1164,0.0008,,0.2989,0.0038,4.785,0.07,0.1161,0.0008,0.874,,1686,19,1897,13,11 29.1,,244,88,0.36,33,0.000214,0.37,,6.34,0.129,0.0753,0.0022,,0.1572,0.0032,1.566,0.069,0.0723,0.0028,0.462,,941,18,993,80,5 30.1,,356,186,0.52,76, -,<0.01,,4.053,0.051,0.0992,0.0008,,0.2469,0.0031,3.393,0.054,0.0997,0.001,0.793,,1422,16,1618,18,12 31.1,,179,99,0.55,11,0.000834,1.61,,13.947,0.248,0.0687,0.0039,,0.0705,0.0013,,,,,,,439,8,,, 32.1,,950,48,0.05,396,0.000022,0.03,,2.061,0.024,0.2047,0.0012,,0.485,0.0056,13.668,0.177,0.2044,0.0012,0.885,,2549,24,2862,10,11 33.1,,383,337,0.88,193,0.000022,0.03,,1.7,0.021,0.2038,0.0008,,0.5922,0.0078,17.144,0.334,0.21,0.0018,0.936,,2998,32,2905,14,-3 34.1,,52,39,0.74,14, -,<0.01,,3.335,0.066,0.1042,0.0019,,0.2999,0.0059,4.323,0.118,0.1045,0.0019,0.728,,1691,29,1706,34,1 35.1,,115,72,0.63,24, -,<0.01,,4.199,0.066,0.0904,0.0013,,0.2382,0.0037,2.972,0.063,0.0905,0.0013,0.732,,1377,19,1436,28,4 36.1,,236,76,0.32,60,0.000042,0.07,,3.395,0.045,0.1066,0.0009,,0.2944,0.0039,4.302,0.07,0.106,0.001,0.806,,1663,19,1732,18,4 37.1,,11,5,0.4,3,0.002513,3.98,,3.27,0.125,0.1094,0.0043,,0.3004,0.0124,3.9,0.389,0.0941,0.007,0.737,,1693,62,1511,141,-12 38.1,,701,78,0.11,204,0.000093,0.14,,2.948,0.033,0.1776,0.0007,,0.3387,0.0038,8.241,0.1,0.1765,0.0008,0.931,,1880,18,2620,7,28 39.1,,143,47,0.33,26,0.000418,0.7,,4.7,0.07,0.0797,0.0012,,0.2123,0.0033,2.271,0.075,0.0776,0.0018,0.756,,1241,18,1137,47,-9 40.1,,1293,391,0.3,459,0.000208,0.31,,2.419,0.027,0.3012,0.001,,0.4122,0.0045,16.993,0.197,0.299,0.0011,0.951,,2225,21,3465,6,36 41.1,,1056,258,0.24,157,0.000271,0.46,,5.78,0.065,0.1044,0.0006,,0.1722,0.002,2.39,0.037,0.1007,0.001,0.737,,1024,11,1636,19,37 42.1,,125,125,1,49,0.000063,0.09,,2.17,0.031,0.1886,0.0015,,0.4604,0.0067,11.925,0.201,0.1879,0.0016,0.858,,2441,29,2723,14,10 43.1,,90,34,0.38,23,0.000309,0.49,,3.298,0.055,0.1014,0.0014,,0.3026,0.0053,4.151,0.138,0.0995,0.0022,0.796,,1704,26,1615,41,-6 44.1,,356,176,0.49,86,0.000055,0.09,,3.544,0.044,0.0979,0.0007,,0.2822,0.0037,3.818,0.094,0.0981,0.0015,0.862,,1603,19,1588,28,-1 45.1,,524,278,0.53,31, -,0.04,,14.435,0.186,0.0558,0.0009,,0.0692,0.0009,,,,,,,432,5,,, 46.1,,420,160,0.38,52,0.000155,0.27,,6.937,0.087,0.0753,0.0008,,0.1438,0.0018,1.45,0.033,0.0731,0.0014,0.553,,866,10,1017,38,15 47.1,,111,41,0.36,30,0.000176,0.28,,3.204,0.05,0.1058,0.0013,,0.3125,0.0051,4.608,0.132,0.1069,0.0019,0.811,,1753,25,1748,33,0 48.1,,58,62,1.08,25,0.00016,0.22,,2.021,0.037,0.1955,0.0023,,0.4938,0.0092,13.18,0.298,0.1936,0.0025,0.823,,2587,40,2773,21,7 49.1,,198,155,0.78,87,0.000071,0.1,,1.957,0.028,0.184,0.0011,,0.5104,0.0073,12.89,0.205,0.1832,0.0013,0.898,,2658,31,2682,12,1 50.1,,56,25,0.46,3,0.002326,1.06,,15.267,0.403,0.0633,0.003,,0.0648,0.0017,,,,,,,405,11,,, "Uncertainties are given at the one s level. Error in SL13 reference zircon calibration was 0.71% for the analytical session (not included in above errors but required when comparing 206Pb/238U data from different mounts). f206 % denotes the percentage of 206Pb that is common Pb. For areas older than ~800 Ma correction for common Pb made using the measured 204Pb/206Pb ratio. For areas younger than ~800 Ma correction for common Pb made using the measured 238U/206Pb and 207Pb/206Pb ratios following Tera and Wasserburg (1972) as outlined in Williams (1998). For % Disc, 0% denotes a concordant analysis.",,,,,,,,,,,,,,,,,,,,,,,,,,