Table 4
Table 4--Chemical analyses of Elk County shales.
| Sample no. | Si O2 | Al2 O3 | Fe2 O3 | Ti O2 | CaO | MgO | P2 O5 | SO3 | K2O | Na2 O | Ignition loss |
|---|---|---|---|---|---|---|---|---|---|---|---|
| EK-1 | 54.20 | 19.87 | 6.37 | 0.98 | 3.20 | 2.04 | 0.18 | 0.14 | 3.12 | 0.49 | 8.32 |
| EK-2 | 59.55 | 20.00 | 5.23 | 1.70 | 1.41 | 1.69 | 0.03 | nil | 3.03 | 0.28 | 7.07 |
| EK-3 | 58.85 | 18.91 | 8.38 | 0.99 | 1.29 | 1.59 | 0.19 | 0.02 | 3.19 | 0.88 | 5.58 |
| EK-4 | 59.17 | 19.05 | 8.40 | 1.30 | 0.42 | 1.52 | 0.12 | nil | 3.05 | 0.93 | 5.48 |
| EK-5 | 62.50 | 16.95 | 6.61 | 1.08 | 0.68 | 2.24 | 0.19 | 0.01 | 2.88 | 1.75 | 4.56 |
Kansas Geological Survey, Geology
Web version July 2002. Original publication date July 1958.
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