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Plagioclase
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Montmorillonite
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Clinopyroxene
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Thin section
|
Depth (mbsf)
|
Length
(mm)
|
Width
(mm)
|
Area
(mm2)
|
W/L
|
EQD
|
Length
(mm)
|
Width
(mm)
|
Area
(mm2)
|
W/L
|
EQD
|
Length
(mm)
|
Width
(mm)
|
Area
(mm2)
|
W/L
|
EQD
|
|
Unit 1256C-18 |
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27 | 281.5 | 0.567 | 0.059 | 0.033 | 0.112 | 0.204 |
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0.224 | 0.053 | 0.012 | 0.243 | 0.122 |
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28 | 282.1 | 1.046 | 0.115 | 0.119 | 0.113 | 0.389 |
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0.780 | 0.122 | 0.090 | 0.171 | 0.338 |
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29 | 282.6 | 1.197 | 0.131 | 0.163 | 0.116 | 0.456 |
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0.866 | 0.126 | 0.111 | 0.147 | 0.376 |
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30 | 284.8 | 1.135 | 0.156 | 0.182 | 0.136 | 0.481 |
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0.877 | 0.201 | 0.172 | 0.237 | 0.468 |
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31 | 285.3 | 1.472 | 0.270 | 0.393 | 0.188 | 0.707 |
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0.946 | 0.310 | 0.299 | 0.345 | 0.617 |
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32 | 286.0 | 1.308 | 0.318 | 0.408 | 0.252 | 0.721 |
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0.916 | 0.362 | 0.328 | 0.410 | 0.646 |
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33 | 286.5 | 1.340 | 0.296 | 0.393 | 0.232 | 0.707 |
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1.000 | 0.270 | 0.284 | 0.281 | 0.601 |
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34 | 287.1 | 1.322 | 0.320 | 0.435 | 0.239 | 0.744 |
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0.908 | 0.298 | 0.280 | 0.338 | 0.597 |
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35 | 287.6 | 1.982 | 0.466 | 0.862 | 0.257 | 1.048 |
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1.480 | 0.330 | 0.495 | 0.233 | 0.794 |
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36 | 288.2 | 1.716 | 0.546 | 0.945 | 0.351 | 1.097 |
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1.412 | 0.322 | 0.474 | 0.244 | 0.777 |
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37 | 288.7 | 2.696 | 0.534 | 1.534 | 0.211 | 1.398 |
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1.418 | 0.494 | 0.713 | 0.334 | 0.953 |
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38 | 289.3 | 1.818 | 0.456 | 0.855 | 0.256 | 1.044 |
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1.660 | 0.452 | 0.756 | 0.272 | 0.981 |
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39 | 289.9 | 2.328 | 0.520 | 1.247 | 0.223 | 1.260 |
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1.602 | 0.476 | 0.821 | 0.297 | 1.022 |
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40 | 290.5 | 1.366 | 0.258 | 0.369 | 0.192 | 0.686 |
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1.468 | 0.400 | 0.568 | 0.301 | 0.851 |
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41 | 291.1 | 1.682 | 0.446 | 0.746 | 0.306 | 0.975 |
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0.736 | 0.366 | 0.268 | 0.518 | 0.584 |
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42 | 291.7 | 2.568 | 0.998 | 2.476 | 0.406 | 1.775 |
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0.838 | 0.316 | 0.247 | 0.434 | 0.561 |
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43 | 292.4 | 2.070 | 0.824 | 1.697 | 0.413 | 1.470 |
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0.904 | 0.298 | 0.277 | 0.353 | 0.593 |
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44 | 292.9 | 1.870 | 0.688 | 1.344 | 0.383 | 1.308 |
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1.268 | 0.386 | 0.533 | 0.288 | 0.823 |
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45 | 293.4 | 1.662 | 0.436 | 0.718 | 0.274 | 0.956 |
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1.022 | 0.322 | 0.320 | 0.348 | 0.639 |
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46 | 293.8 | 1.588 | 0.408 | 0.649 | 0.259 | 0.909 |
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0.802 | 0.260 | 0.209 | 0.334 | 0.516 |
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47 | 294.0 | 1.704 | 0.494 | 0.886 | 0.306 | 1.062 |
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0.970 | 0.344 | 0.329 | 0.383 | 0.647 |
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48 | 294.3 | 1.674 | 0.408 | 0.674 | 0.261 | 0.927 |
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0.648 | 0.334 | 0.221 | 0.528 | 0.531 |
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49 | 294.7 | 1.742 | 0.624 | 1.079 | 0.376 | 1.172 |
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0.786 | 0.200 | 0.158 | 0.254 | 0.449 |
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50 | 294.3 | 1.566 | 0.448 | 0.710 | 0.289 | 0.951 |
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0.768 | 0.218 | 0.171 | 0.301 | 0.467 |
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51 | 294.9 | 1.584 | 0.362 | 0.556 | 0.249 | 0.841 |
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0.830 | 0.286 | 0.241 | 0.348 | 0.553 |
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52 | 295.5 | 1.768 | 0.490 | 0.834 | 0.292 | 1.030 |
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1.258 | 0.376 | 0.452 | 0.310 | 0.759 |
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53 | 296.0 | 1.772 | 0.374 | 0.710 | 0.209 | 0.951 |
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0.876 | 0.420 | 0.361 | 0.487 | 0.678 |
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54 | 296.4 | 1.474 | 0.302 | 0.459 | 0.213 | 0.764 |
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1.016 | 0.396 | 0.390 | 0.415 | 0.705 |
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55 | 296.9 | 1.774 | 0.300 | 0.551 | 0.175 | 0.837 |
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0.840 | 0.336 | 0.275 | 0.428 | 0.592 |
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56 | 297.3 | 1.592 | 0.312 | 0.488 | 0.204 | 0.789 |
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0.806 | 0.316 | 0.238 | 0.421 | 0.550 |
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57 | 297.8 | 1.618 | 0.414 | 0.682 | 0.259 | 0.932 |
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0.832 | 0.366 | 0.320 | 0.466 | 0.638 |
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58 | 298.3 | 1.826 | 0.480 | 0.916 | 0.261 | 1.080 |
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0.764 | 0.368 | 0.277 | 0.510 | 0.594 |
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59 | 298.9 | 1.514 | 0.314 | 0.453 | 0.215 | 0.760 |
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0.848 | 0.388 | 0.317 | 0.510 | 0.635 |
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60 | 299.6 | 1.434 | 0.256 | 0.374 | 0.176 | 0.690 |
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0.820 | 0.440 | 0.361 | 0.571 | 0.678 |
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61 | 300.0 | 1.718 | 0.366 | 0.628 | 0.228 | 0.894 |
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0.742 | 0.422 | 0.322 | 0.598 | 0.640 |
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62 | 300.7 | 1.290 | 0.338 | 0.444 | 0.278 | 0.752 |
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0.690 | 0.440 | 0.310 | 0.638 | 0.628 |
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63 | 300.9 | 1.420 | 0.432 | 0.621 | 0.296 | 0.889 |
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0.754 | 0.374 | 0.290 | 0.531 | 0.607 |
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64 | 303.9 | 1.774 | 0.340 | 0.637 | 0.195 | 0.900 |
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0.848 | 0.430 | 0.378 | 0.524 | 0.693 |
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65 | 304.4 | 1.370 | 0.248 | 0.362 | 0.183 | 0.679 |
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0.742 | 0.428 | 0.330 | 0.569 | 0.648 |
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66 | 305.0 | 1.400 | 0.350 | 0.493 | 0.240 | 0.792 |
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0.928 | 0.516 | 0.497 | 0.574 | 0.796 |
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67 | 305.6 | 1.364 | 0.276 | 0.369 | 0.208 | 0.685 |
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0.858 | 0.430 | 0.366 | 0.554 | 0.683 |
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68 | 306.2 | 1.524 | 0.356 | 0.526 | 0.251 | 0.818 |
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0.828 | 0.428 | 0.354 | 0.536 | 0.671 |
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69 | 306.9 | 1.364 | 0.276 | 0.369 | 0.208 | 0.685 |
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0.914 | 0.592 | 0.579 | 0.663 | 0.859 |
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70 | 307.4 | 1.440 | 0.314 | 0.468 | 0.205 | 0.772 |
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0.816 | 0.406 | 0.337 | 0.519 | 0.655 |
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71 | 308.0 | 1.562 | 0.260 | 0.410 | 0.169 | 0.723 |
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0.700 | 0.372 | 0.278 | 0.554 | 0.595 |
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72 | 308.6 | 1.778 | 0.272 | 0.482 | 0.163 | 0.783 |
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0.862 | 0.434 | 0.387 | 0.527 | 0.702 |
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73 | 309.3 | 1.804 | 0.288 | 0.528 | 0.168 | 0.820 |
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1.084 | 0.528 | 0.603 | 0.520 | 0.876 |
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74 | 309.9 | 1.756 | 0.356 | 0.630 | 0.212 | 0.896 |
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1.100 | 0.602 | 0.646 | 0.593 | 0.907 |
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75 | 310.4 | 1.534 | 0.214 | 0.327 | 0.141 | 0.645 |
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1.056 | 0.508 | 0.523 | 0.505 | 0.816 |
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76 | 311.2 | 1.336 | 0.260 | 0.352 | 0.201 | 0.669 |
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0.732 | 0.316 | 0.226 | 0.472 | 0.537 |
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77 | 311.7 | 1.512 | 0.282 | 0.449 | 0.191 | 0.756 |
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0.811 | 0.297 | 0.234 | 0.385 | 0.546 |
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78 | 311.9 | 0.795 | 0.103 | 0.082 | 0.131 | 0.322 |
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0.443 | 0.133 | 0.058 | 0.301 | 0.272 |
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79 | 312.1 | 0.02700 | 0.01400 | 0.00040 | 0.55105 | 0.022 | 0.0975 | 0.0775 | 0.00763 | 0.7923 | 0.099 | 0.027 | 0.016 | 0.00044 | 0.620 | 0.024 |
|
80 | 312.4 | 0.03160 | 0.01480 | 0.00047 | 0.46358 | 0.025 | 0.0304 | 0.0220 | 0.00068 | 0.7318 | 0.030 | 0.020 | 0.013 | 0.00026 | 0.666 | 0.018 |
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81 | 312.8 | 0.01660 | 0.00800 | 0.00013 | 0.57706 | 0.013 | 0.0178 | 0.0116 | 0.00020 | 0.6825 | 0.016 | 0.016 | 0.012 | 0.00020 | 0.758 | 0.016 |
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82 | 313.0 | 0.03000 | 0.01280 | 0.00041 | 0.44008 | 0.023 | 0.0168 | 0.0116 | 0.00019 | 0.7112 | 0.016 | 0.014 | 0.011 | 0.00016 | 0.794 | 0.014 |
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83 | 313.3 | 0.02000 | 0.00560 | 0.00011 | 0.30434 | 0.012 | 0.0132 | 0.0090 | 0.00012 | 0.6952 | 0.012 | 0.013 | 0.009 | 0.00011 | 0.712 | 0.012 |
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84 | 313.3 |
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0.0122 | 0.0078 | 0.00010 | 0.6221 | 0.011 | 0.014 | 0.008 | 0.00011 | 0.593 | 0.012 |
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Unit 1256D-1 |
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90 | 276.6 | 1.312 | 0.222 | 0.288 | 0.177 | 0.606 |
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91 | 277.0 | 1.236 | 0.206 | 0.247 | 0.172 | 0.561 |
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92 | 281.4 | 3.010 | 0.498 | 1.535 | 0.189 | 1.398 |
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93 | 286.0 | 2.122 | 0.612 | 1.269 | 0.295 | 1.271 |
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94 | 288.5 | 2.088 | 0.552 | 1.184 | 0.267 | 1.228 |
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96 | 289.8 | 1.554 | 0.350 | 0.519 | 0.242 | 0.813 |
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95 | 293.9 | 1.746 | 0.488 | 0.859 | 0.273 | 1.046 |
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97 | 300.8 | 1.536 | 0.274 | 0.415 | 0.182 | 0.727 |
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98 | 303.4 | 1.560 | 0.308 | 0.463 | 0.201 | 0.767 |
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99 | 307.5 | 1.914 | 0.394 | 0.742 | 0.221 | 0.972 |
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100 | 315.4 | 1.600 | 0.330 | 0.533 | 0.211 | 0.824 |
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101 | 319.6 | 1.820 | 0.348 | 0.611 | 0.198 | 0.882 |
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102 | 324.1 | 1.634 | 0.260 | 0.447 | 0.164 | 0.755 |
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103 | 328.4 | 1.394 | 0.276 | 0.378 | 0.199 | 0.693 |
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104 | 328.5 | 1.470 | 0.250 | 0.354 | 0.174 | 0.671 |
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105 | 329.2 | 1.642 | 0.248 | 0.415 | 0.149 | 0.727 |
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106 | 334.9 | 1.388 | 0.248 | 0.360 | 0.180 | 0.677 |
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107 | 349.9 | 2.048 | 0.210 | 0.428 | 0.106 | 0.739 |
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138* | Host lobes within 4 mm above and below the seal zone | Recrystallized montmorillonite has unimodal size | Recrystallized clinopyroxene is bimodal |
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Upper flow |
|
0.455 | 0.053 |
|
0.098 | 0.171 |
|
|
|
|
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0.168 | 0.096 |
|
0.520 | 0.144 |
|
Recrystallized |
|
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0.0174 | 0.0142 |
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0.8266 | 0.0177 | 0.012 | 0.009 |
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0.771 | 0.012 | Coarse part |
Recrystallized |
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0.006 | 0.005 |
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0.785 | 0.006 | Fine part |
Lower flow |
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0.643 | 0.100 |
|
0.130 | 0.2874 |
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|
|
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0.251 | 0.147 |
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0.515 | 0.218 |
|
Notes: W/L = width/length. EQD = diameter of a circle with equivalent area to a crystal. * = grain sizes of recrystallized flow-lobe margin and adjacent lava above and below. Note: This table is also available in ASCII.