Table T5. XRD mineralogy by unit. (See table note.)
| Mineral | Maximum | Minimum | Average | Standard deviation |
|---|---|---|---|---|
| Unit I | ||||
| Clay | 52.7 | 27.9 | 39.5 | 6.5 |
| Quartz | 32.9 | 19.1 | 26.3 | 3.2 |
| Plagioclase | 47.3 | 24.1 | 33.0 | 6.7 |
| Calcite | 7.5 | 0.0 | 1.2 | 2.1 |
| Calcite | 7.5 | 0.2 | 3.2 | 2.4 |
| Subunit IIA | ||||
| Clay | 55.0 | 28.5 | 42.3 | 6.6 |
| Quartz | 28.6 | 20.4 | 24.1 | 2.5 |
| Plagioclase | 46.1 | 21.0 | 33.4 | 6.9 |
| Calcite | 2.7 | 0.0 | 0.2 | 0.6 |
| Calcite | 2.7 | 0.5 | 1.5 | 1.0 |
| Subunit IIB | ||||
| Clay | 52.3 | 31.9 | 43.1 | 6.7 |
| Quartz | 26.9 | 22.2 | 25.4 | 1.7 |
| Plagioclase | 41.6 | 22.8 | 31.5 | 7.4 |
| Calcite | 0.0 | 0.0 | 0.0 | 0.0 |
| Calcite | 0.0 | 0.0 | 0.0 | 0.0 |
| Subunit IIC | ||||
| Clay | 74.7 | 30.6 | 46.5 | 7.9 |
| Quartz | 29.6 | 7.5 | 22.7 | 3.5 |
| Plagioclase | 51.8 | 13.5 | 30.0 | 7.4 |
| Calcite | 12.2 | 0.0 | 0.8 | 2.0 |
| Calcite | 12.2 | 0.1 | 2.7 | 2.9 |
| Subunit IID | ||||
| Clay | 57.9 | 45.9 | 51.1 | 3.7 |
| Quartz | 25.5 | 17.3 | 22.3 | 2.5 |
| Plagioclase | 29.0 | 15.0 | 24.6 | 4.5 |
| Calcite | 12.9 | 0.0 | 2.0 | 4.1 |
| Calcite | 12.9 | 0.2 | 5.1 | 5.3 |
| Unit III | ||||
| Clay | 68.5 | 56.9 | 64.7 | 2.4 |
| Quartz | 22.6 | 16.9 | 19.9 | 1.4 |
| Plagioclase | 20.5 | 10.7 | 14.9 | 1.8 |
| Calcite | 11.4 | 0.0 | 0.5 | 1.8 |
| Calcite | 11.4 | 1.8 | 4.5 | 3.9 |
Note: For each subunit, calcite results are first presented for all samples, and then for only those samples containing calcite.
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