Table A1. Major-element analysis of glass from tephra sample AB-4-29-98-1(1), Blind Slough, Oregon

No. Na2O MgO Al2O3 SiO2 K2O CaO TiO2 MnO FeO Total
81 4.669 0.299 13.915 72.818 2.263 1.565 0.145 0.043 1.749 97.466
84 4.645 0.291 13.877 72.668 2.251 1.581 0.224 0.018 1.356 96.911
85 4.688 0.305 13.878 73.465 2.229 1.637 0.185 0.004 1.567 97.958
87 4.358 0.274 13.643 71.516 2.210 1.547 0.196 0.007 1.476 95.227
89 4.640 0.274 14.014 72.998 2.344 1.647 0.204 0.048 1.405 97.574
90 4.590 0.287 13.840 73.038 2.350 1.611 0.273 0.027 1.626 97.642
91 4.687 0.309 14.136 72.691 2.141 1.698 0.175 0.012 1.526 97.375
97 4.790 0.343 14.263 73.577 2.248 1.815 0.235 0.160 1.586 99.017
100 4.794 0.280 14.002 73.238 2.273 1.561 0.181 0.048 1.511 97.888
101 4.547 0.287 13.816 73.117 2.235 1.543 0.173 0.018 1.600 97.336
102 4.612 0.316 14.398 73.482 2.247 1.557 0.211 0.038 1.614 98.475
104 4.798 0.298 14.146 73.642 2.293 1.656 0.220 0.054 1.584 98.691
109 4.654 0.301 14.067 72.618 2.227 1.651 0.196 0.033 1.567 97.314
Mean* 4.652 0.297 14.000 72.990 2.255 1.621 0.201 0.039 1.551 97.606
Std Dev. 0.118 0.019 0.203 0.567 0.055 0.077 0.032 0.040 0.101 0.936
Range 0.44 0.069 0.755 2.126 0.209 0.272 0.128 0.156 0.393 3.79
Minimum 4.358 0.274 13.643 71.516 2.141 1.543 0.145 0.004 1.356 95.227
Maximum 4.798 0.343 14.398 73.642 2.35 1.815 0.273 0.16 1.749 99.017
Count 13 13 13 13 13 13 13 13 13 13
CL 95.0% 0.071 0.011 0.123 0.342 0.033 0.046 0.020 0.024 0.061 0.565

Data provided by Andrei M. Sarna-Wojcicki.
Sample collected by Alex Bourdeaux and analyzed by Jim Walker.
Means recalculated for total 100% and listed as sample 1 in Table A2 of this electronic supplement.