| CHAFIK, NASSIRA | Poster social |
| Cacace, Mauro | 01.b) 3D Geological Modeling: Technical Advancements and Regional Geological Insights |
| Cantine, Marjorie | 08.d) Supercontinents through space and time |
| Carl-Dworschak, Anton | 05.a) Host rock characterization and long-term safety of deep geological repositories for high-level radioactive waste |
| Carracedo, Juan C. | 08.a) Magmatism, volcanism, and related processes |
| Carter, Lawrence | 03.g) Advances in pegmatite exploration |
| Cerny, Jan | 01.c) Regional geology and palaeogeography Presenter |
| Chakankar, Mital Vivek | 03.c) Biohydrometallurgy for Biomining, Metal recycling and Bioremediation Presenter |
| Chamberlain, Page C. | 08.f) Interactions between mountain building, climate and biodiversity |
| Chen, Yonghui | Poster social Presenter |
| Cheng, Chaojie | Poster social Poster social Poster social Presenter 05.f) Hydrogen in the energy transition –white to green hydrogen and subsurface storage Session Chair |
| Chiaburu, Teodor | 14.c) Data Meets Earth: AI-Driven Innovations in Geoscience |
| Chiarenzelli, Jeff | 01.c) Regional geology and palaeogeography |
| Christiansen, Rodolfo | Poster social 04.a) Geothermal Resources – from Play Analysis to Case Studies 05.f) Hydrogen in the energy transition –white to green hydrogen and subsurface storage Presenter |
| Clarke, Leon | 08.c) Latest Achievements in Scientific Ocean and Continental Drilling |
| Class, Holger | 05.c) Groundwater under quality stress – hydrogeochemical consequences of human action |
| Clift, Peter Dominic | 08.f) Interactions between mountain building, climate and biodiversity Presenter |
| Clubb, Fiona Jane | Poster social |
| Coenen, Douglas | Poster social |
| Cojan, Isabelle | Poster social |
| Condon, Dan | 08.d) Supercontinents through space and time |
| Corre, Marianna | 06.b) Isotopes in geosciences: Geochronology and provenance |
| Couffignal, Frédéric | 10.a) Recent Developments of Geoanalytical Methods |
| Černý, Jan | 03.a) Mineral Exploration, Economic and Ore Deposit Geology |