| OGÉ, Valentin | 03.a) Mineral Exploration, Economic and Ore Deposit Geology Presenter |
| Obst, Karsten | Poster social
08.a) Magmatism, volcanism, and related processes Presenter
Poster social Presenter |
| Oelmann, Yvonne | 05.c) Groundwater under quality stress – hydrogeochemical consequences of human action |
| Oelze, Marcus | 03.a) Mineral Exploration, Economic and Ore Deposit Geology |
| Oestreicher, Nicolas | 08.a) Magmatism, volcanism, and related processes |
| Olaka, Lydia | 12.a) Advancements on the distribution, reactivity and behaviour of TCEs in aquatic systems: updates and future research direction |
| Omlin, Andreas | Poster social |
| Opfer, Lukas Daniel | Poster social |
| Opluštil, Stanislav | 02.a) Stratigraphy – dissecting geological time |
| Osenbrück, Karsten | 05.a) Host rock characterization and long-term safety of deep geological repositories for high-level radioactive waste |
| Ostertag-Henning, Christian | 03.a) Mineral Exploration, Economic and Ore Deposit Geology
05.f) Hydrogen in the energy transition –white to green hydrogen and subsurface storage Presenter
05.f) Hydrogen in the energy transition –white to green hydrogen and subsurface storage Session Chair |
| Ott, Florian | 14.b) How can research data infrastructures meet today’s and future needs of the geosciences?
14.b) How can research data infrastructures meet today’s and future needs of the geosciences? |
| Ovtcharova, Maria | Poster social
08.d) Supercontinents through space and time
08.d) Supercontinents through space and time |
| Ölmez, Jasemin Ayse | 01.c) Regional geology and palaeogeography Presenter
Poster social
Poster social Presenter |