Scientists Map 30 Hidden Basins Beneath Antarctica

Scientists have uncovered a hidden geological wonder beneath Antarctica that could reshape our understanding of Earth's ancient past and its frozen future.

An international research team led by geophysicist Egidio Armadillo at the University of Genoa has mapped a giant province of around 30 connected basins under East Antarctica. The structure, named the East Antarctic Fan-Shaped Basin Province, spreads out like a fan toward the coast and lies beneath roughly half of the East Antarctic Ice Sheet.

The discovery wasn't planned. Researchers were simply trying to picture what East Antarctica would look like without its ice, accounting for how the land would rise up to a kilometer once freed from the ice's massive weight.

When they combined radar, gravity, seismic, and magnetic data, a stunning pattern emerged. The basins fanned out from a single point near the South Pole, suggesting the Earth's crust was pulled apart from a central pivot point millions of years ago.

This ancient stretching may have happened before the supercontinent Gondwana broke up, when Antarctica, Australia, Africa, and other landmasses were joined together. The weak zone left behind could have later helped steer the split between Antarctica and Australia, filling an important gap in Earth's geological puzzle.

The Bright Side

The mapped basins include the Wilkes Subglacial Basin, previously known but now understood as part of this larger system. Understanding these hidden contours is essential because the ice sheet above isn't sitting still.

The ice constantly flows, steered by the rock underneath like water following a riverbed. Knowing these underground highways in detail helps scientists predict where the ice will move and how fast, crucial information for understanding future sea level changes.

Antarctica makes up about a tenth of Earth's land surface, but most of it remains buried under ice thousands of meters thick. Each new discovery like this one helps scientists piece together millions of years of hidden history.

The team acknowledges the timing is still uncertain, and the fan shape could represent several stretching events layered over time. That's the next puzzle to solve, turning this remarkable find into an even clearer picture of our planet's deep past and dynamic future.