Overview
- A peer-reviewed paper published June 3, 2026, formally defines the East Antarctic Fan-Shaped Basin Province (EAFBP) as a single, fan-shaped network of subglacial basins that includes Wilkes, Aurora and the basin holding Lake Vostok.
- The team mapped the structure by stitching together seismic, gravity, magnetic, radio-echo sounding and crustal-model data to reveal a fan pattern that converges near the continent’s central region.
- Researchers interpret the pattern as the product of distributed rotational extension, a process where continental crust spread outward from a focal point over geologic time.
- Because the EAFBP lies beneath roughly half of the East Antarctic Ice Sheet, its bedrock shape likely guides ice flow and the location of subglacial lakes, which could change how parts of the ice sheet respond to warming.
- Authors stress key unknowns—especially the province’s precise age and the detailed geodynamic steps that formed it—and call for targeted modelling, geophysical surveys and possible drilling or seismic campaigns to measure risks to ice stability and sea level.