| Element | A-2, Soil | A-4, Soil | A-5, Soil | A-3, Rock "Barnacle Bill" |
A-7, Rock "Yogi" |
|---|---|---|---|---|---|
| weight % | weight % | weight % | weight % | weight % | |
| Carbon [C] (see note 2) | - | - | - | - | - |
| Oxygen [O] (see note 2) | 42.5 | 43.9 | 43.2 | 45.0 | 44.6 |
| Sodium [Na] | 3.2 | 3.8 | 2.6 | 3.1 | 1.9 |
| Magnesium [Mg] | 5.3 | 5.5 | 5.2 | 1.9 | 3.8 |
| Aluminum [Al] | 4.2 | 5.5 | 5.4 | 6.6 | 6.0 |
| Silicon [Si] | 21.6 | 20.2 | 20.5 | 25.7 | 23.8 |
| Phosphorus [P] | - | 1.5 | 1.0 | 0.9 | 0.9 |
| Sulphur [S] | 1.7 | 2.5 | 2.2 | 0.9 | 1.7 |
| Chlorine [Cl] | - | 0.6 | 0.6 | 0.5 | 0.6 |
| Potassium [K] (see note 4) | 0.5 | 0.6 | 0.6 | 1.2 | 0.9 |
| Calcium [Ca] | 4.5 | 3.4 | 3.8 | 3.3 | 4.2 |
| Titanium [Ti] | 0.6 | 0.7 | 0.4 | 0.4 | 0.5 |
| Chromium [Cr] | 0.2 | 0.3 | 0.3 | 0.1 | 0.0 |
| Manganese [Mn] (see note 4) | 0.4 | 0.4 | 0.5 | 0.7 | 0.4 |
| Iron [Fe] | 15.2 | 11.2 | 13.6 | 9.9 | 10.7 |
| Nickel [Ni] | - | - | 0.1 | - | - |
| Sum | 100.0 | 100.0 | 100.0 | 100.0 | 100.0 |