| C Carboniferous |
| CD Carboniferous-Devonian |
| Cm Cambrian |
| CmpCm Cambrian-Precambrian |
| CzMzi Cenozoic-Mesozoic Intrusives |
| CzMzv Mesozoic-Cenozoic Volcanics |
| Czv Cenozoic Volcanics |
| D Devonian |
| Lakes and wide rivers |
| Io Ophiolites (undifferentiated) |
| J Jurassic |
| JTr Jurassic-Triassic |
| K Cretaceous |
| KJ Cretaceous-Jurassic |
| Mz Mesozoic |
| MzPzi Mesozoic-Paleozoic Volcanics |
| MzPzi Mesozoic-Paleozoic Intrusives |
| Mzi Mesozoic Intrusives |
| Mzo Mesozoic Ophiolites |
| Mzv Mesozoic Volcanics |
| N Neogene |
| O Ordovician |
| P Permian |
| PC Permian-Carboniferous |
| Pg Paleogene |
| Pz Paleozoic |
| PzpCm Precambrian-Paleozoic |
| Pzv Paleozoic Volcanics |
| Q Quaternary |
| QN Quaternary-Neogene |
| Qe Quaternary eolian |
| Qsk Quaternanry sabkha/marsh |
| Qv Quaternary Volcanics |
| S Silurian |
| SO Silurian-Ordovician |
| Salt Salt Undifferentiated |
| T Tertiary |
| TK Tertiary-Cretaceous |
| Ti Tertiary Intrusives |
| To Tertiary Ophiolites |
| Tr Triassic |
| TrP Triassic-Permian |
| Tv Tertiary Volcanics |
| Areas outside of Iran |
| acid Acid igneous unknown age and type |
| ae Acid Extrusives unknown age |
| ai Acid Intrusives unknown age |
| basic Basic igneous unknown age and type |
| be Basic Extrusives unknown age |
| bi Basic Intrusives unknown age |
| ie Intermediate Extrusives unknown age |
| ii Intermediate Intrusives unknown age |
| inter Intermediate igneous unknown age and type |
| pCm Precambrian |
| pCmi Precambrian Intrusives |
| pCmv Precambrian Volcanics |
| vs Volcanics and Sedimentary deposites undiferentiated |
