Table T8. XRD mineralogy by unit. (See table note.)
| Mineral | Maximum | Minimum | Average | Standard deviation |
|---|---|---|---|---|
| Subunit IIC | ||||
| Clay | 54.1 | 38.0 | 48.4 | 4.8 |
| Quartz | 28.6 | 19.7 | 23.6 | 2.3 |
| Plagioclase | 39.5 | 22.7 | 27.1 | 3.8 |
| Calcite | 4.0 | 0.0 | 0.9 | 1.4 |
| Calcite | 4.0 | 0.3 | 2.3 | 1.3 |
| Subunit IID | ||||
| Clay | 62.1 | 49.4 | 54.4 | 4.1 |
| Quartz | 21.9 | 13.2 | 20.1 | 3.1 |
| Plagioclase | 31.3 | 16.8 | 24.2 | 4.5 |
| Calcite | 5.8 | 0.0 | 1.3 | 2.2 |
| Calcite | 5.8 | 1.1 | 3.1 | 2.4 |
| Unit III | ||||
| Clay | 68.2 | 61.2 | 64.8 | 2.0 |
| Quartz | 21.1 | 17.8 | 19.4 | 1.1 |
| Plagioclase | 19.0 | 11.5 | 15.3 | 1.9 |
| Calcite | 4.3 | 0.0 | 0.4 | 1.0 |
| Calcite | 4.3 | 0.6 | 1.8 | 1.5 |
Note: For each subunit, calcite results are first presented for all samples and then for only those samples containing calcite.
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