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Proposed Title 1: - Queen's University

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Corrected ratios<br />

Apparent ages ( ±1σ, Ma)**<br />

Sample<br />

Deposit<br />

206 Pb/ 204 Pb<br />

207 Pb/ 204 Pb<br />

207 Pb/ 206 Pb ±2σ<br />

206 Pb/ 238 U ±2σ<br />

207 Pb/ 235 U ±2σ R‡<br />

207 Pb/ 206 Pb ±<br />

206 Pb/ 238 U ±<br />

207 Pb/ 235 U ± Disc‡<br />

El Sherana 5 El Sherana 3605 - 0.0780 0.0023 0.0591 0.0021 0.6221 0.0110 0.134 1146 58 370 13 491 7 68<br />

El Sherana 7 El Sherana 1767 - 0.0935 0.0041 0.0706 0.0040 0.8149 0.0195 0.020 1498 80 440 24 605 11 71<br />

El Sherana 8 El Sherana 3975 - 0.0885 0.0043 0.0656 0.0043 0.7161 0.0155 0.230 1394 90 410 26 548 9 71<br />

El Sherana 9 El Sherana 1251 - 0.0989 0.0048 0.0893 0.0078 1.1072 0.0697 0.632 1604 87 551 46 757 33 66<br />

El Sherana 11 El Sherana 1944 - 0.1099 0.0068 0.0715 0.0052 0.7964 0.0207 0.035 1798 109 445 31 595 12 75<br />

El Sherana 12 El Sherana 1526 - 0.1116 0.0057 0.0754 0.0054 0.9074 0.0193 0.033 1825 90 469 32 656 10 74<br />

El Sherana 13 El Sherana 1476 - 0.0884 0.0022 0.0735 0.0021 0.8950 0.0135 0.204 1392 48 457 12 649 7 67<br />

El Sherana 14 El Sherana 1707 - 0.0843 0.0022 0.0657 0.0018 0.7582 0.0109 0.026 1300 50 410 11 573 6 68<br />

El Sherana 17 El Sherana 1087 - 0.0882 0.0015 0.0934 0.0044 1.1724 0.0593 0.924 1387 33 575 26 788 27 59<br />

El Sherana 18 El Sherana 1257 - 0.0920 0.0015 0.1394 0.0114 1.7701 0.1447 0.941 1467 32 841 64 1035 52 43<br />

El Sherana 19 El Sherana 1388 - 0.0886 0.0020 0.0808 0.0045 0.9891 0.0550 0.897 1395 42 501 27 698 28 64<br />

268

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