| Consolidated Sediments (Pre-Cambrian -Devonian and other ages) |
| Crystalline Rocks (Archaean -Pre-Cambrian) |
| Residual Cappings (Cretaceous -Recent) |
| Semi-Consolidated Sediments (Carboniferous -Pliocene and other ages) |
| Un-consolidated Sediments (Quaternary -Recent) |
| Volcanic Flows & Inter-trapeans (Cretaceous -Eocene -Recent) |