| C Carboniferous |
| CD Carboniferous-Devonian |
| C Cambrian |
| Cz Undivided Cenozoic |
| CzMz Cenozoic-Mesozoic intrusive rocks |
| CzMz Cenozoic-Mesozoic volcanic rocks |
| Czv Cenozoic volcanic rocks |
| D Devonian |
| DS Devonian-Silurian |
| Surface water |
| J Jurassic |
| JTr Jurassic-Triassic |
| K Cretaceous |
| KJ Cretaceous-Jurassic |
| Mz Undivided Mesozoic |
| MzPz Mesozoic-Paleozoic |
| MzPz Mesozoic-Paleozoic metamorphic rocks |
| Mz Mesozoic intrusive rocks |
| Mz Mesozoic metamorphic rocks |
| Mz Mesozoic volcanic rocks |
| N Neogene |
| O Ordovician |
| OCm Ordovician-Cambrian |
| P Permian |
| Pg Paleogene |
| Pz Undivided Paleozoic |
| Pz Paleozoic intrusive rocks |
| Pzl Lower Paleozoic |
| Pz Paleozoic metamorphic rocks |
| PzpC Paleozoic-Precambrian |
| PzpC Paleozoic-Precambrian metapmorphic rocks |
| Pzu Upper Paleozoic |
| Pz Paleozoic volcanic rocks |
| Q Undivided Quaternary |
| Qv Quaternary volcanic rocks |
| S Silurian |
| SO Silurian-Ordovician |
| T Undivided Tertiary |
| TK Tertiary-Cretaceous |
| Tr Triassic |
| TrP Triassic-Permian |
| Tv Tertiary volcanic rocks |
| i Intrusive igneous rocks |
| Glacial ice |
| m Metamorphic rocks |
| Unmapped area |
| pC Undivided Precambrian |
| pC Precambrian intrusive rocks |
| pC Precambrian volcanic rocks |
