Table T6. XRD mineralogy by unit. (See table note.)
| Mineral | Maximum | Minimum | Average | Standard deviation |
|---|---|---|---|---|
| Subunit IA | ||||
| Clay | 64.4 | 27.2 | 47.6 | 6.6 |
| Quartz | 33.9 | 11.9 | 22.9 | 3.6 |
| Plagioclase | 39.5 | 14.6 | 22.7 | 4.8 |
| Calcite | 36.7 | 0.0 | 6.7 | 8.3 |
| Calcite | 36.7 | 0.2 | 8.9 | 8.5 |
| Subunit IB | ||||
| Clay | 52.0 | 40.0 | 47.7 | 4.5 |
| Quartz | 22.8 | 15.5 | 19.0 | 2.3 |
| Plagioclase | 42.9 | 27.3 | 32.1 | 5.3 |
| Calcite | 7.2 | 0.0 | 1.3 | 2.7 |
| Calcite | 7.2 | 1.6 | 4.4 | 4.0 |
| Unit II | ||||
| Clay | 56.7 | 51.8 | 54.6 | 2.5 |
| Quartz | 21.1 | 18.8 | 19.7 | 1.2 |
| Plagioclase | 28.5 | 23.6 | 25.5 | 2.6 |
| Calcite | 0.5 | 0.0 | 0.2 | 0.3 |
| Calcite | 0.5 | 0.0 | ||
Note: For each subunit, calcite results are first presented for all samples and then for only those samples containing calcite.
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