The Antarctic continent contains approximately 10% of Earth's least understood continental crust, much of it hidden beneath the Antarctic Ice Sheet. Yet this concealed lithosphere exerts a fundamental influence on geothermal heat flow, subglacial hydrology, sediment and nutrient fluxes, ice-sheet behaviour, ocean productivity, and climate feedbacks. Understanding Antarctica therefore requires a truly interdisciplinary perspective that links solid Earth processes with the cryosphere, hydrosphere, biosphere and atmosphere. This session provides a forum for the newly approved SCAR Scientific Research Programme Antarctic Geosphere Evolution (AGE), which aims to advance understanding of Antarctica's four-dimensional lithospheric evolution and its interactions with Earth-system processes. We welcome contributions spanning geological, geophysical, geochemical, biological and modelling approaches, particularly studies that bridge traditional disciplinary boundaries. Topics may include, but are not limited to:
• Antarctic lithospheric architecture and tectonic evolution
• Geodynamics, mantle structure and geothermal heat flow
• Lithosphere-cryosphere coupling and ice-sheet dynamics
• Subglacial hydrology and groundwater systems
• Sediment, dust and nutrient fluxes from Antarctica to the Southern Ocean
• Provenance studies and reconstruction of the hidden Antarctic continent
• Interactions between geological processes, marine productivity and biogeochemical cycles
• Integration of geological, geophysical and geochemical datasets
• Integration of Antarctica’s components in full-plate reconstructions and computational tectonics.
The session particularly encourages studies that develop new connections between disciplines and improve understanding of how Antarctica's lithosphere influences the wider Earth system across spatial and temporal scales.