| Code | Name | Scope Note |
|---|---|---|
| F1260102 | Engineering Geology | (Including Geohazard) |
| F1260199 | Other Geology n.e.c. | |
| F1260118 | Volcanology | |
| F1260117 | Structural Geology | |
| F1260116 | Stratigraphy | |
| F1260115 | Speleology | |
| F1260114 | Sedimentology | |
| F1260113 | Petrology | (Including Igneous and Metamorphic Petrology, Sedimentary Petrology) |
| F1260112 | Petroleum Geology | (Including Coal Geology) |
| F1260111 | Palaeontology | (Including Pollen Dating) |
| F1260109 | Marine Geoscience | |
| F1260108 | Historical Geology | (Including Quaternary Geology) |
| F1260107 | Glaciology | |
| F1260106 | Geotectonics | |
| F1260105 | Geomorphology | |
| F1260104 | Geochronology | (Including Radiometrics, Carbon Dating) |
| F1260103 | Environmental Geology | (Including Conservation Geology/Geotourism) |
| F1260101 | Economic Geology | (Including Ore Deposit Petrology) |
| F1260110 | Mineralogy | (Including Crystallography and Gemology) |
| Code | Name |
|---|---|
| F1260699 | Other Ionosphere and Upper Atmosphere n.e.c. |
| F1260609 | Seismo-Ionospheric Coupling |
| F1260608 | Profile |
| F1260607 | Morphology |
| F1260606 | Irregularities |
| F1260605 | Ionospheric Sounding |
| F1260604 | Geomagnetic Field |
| F1260603 | Electron Content and Scintillation |
| F1260602 | Effects on Electromagnetic Waves |
| F1260601 | Dynamics |