Scientists Discover Vast Fan-Shaped Basin Province Beneath East Antarctica

Discovery of the East Antarctic Fan-Shaped Basin Province

An international team of researchers has discovered a vast, fan-shaped network of hidden basins located beneath the East Antarctic Ice Sheet. The findings, published in the journal *Nature Geoscience*, reveal that several previously known subglacial features are actually components of a single, massive geological structure.

The researchers have named this feature the East Antarctic Fan-Shaped Basin Province. This semi-continental-sized physiographic unit consists of a system of enormous subglacial basins that radiate from a focal point situated near the South Pole. In some areas, these basins are buried under ice exceeding three kilometers in thickness.

Geological Composition and Formation

The discovery was made through the joint interpretation of geophysical data and sub-ice topography investigations. These tools allowed scientists to image a set of low-elevation, V-shaped basins with significantly improved detail compared to previous studies.

According to the study published in *Nature Geoscience*, the researchers propose that this fan-like landscape was created by distributed intraplate rotational extension. This geological process occurred prior to the breakup of the supercontinent Gondwana. The tectonic setting of the continent beneath the East Antarctic Ice Sheet has historically remained unclear, but these findings provide a new framework for understanding the region's wider geology.

Implications for Glaciology and Tectonics

The identification of the East Antarctic Fan-Shaped Basin Province is expected to assist scientists in better understanding the current behavior of the overlying ice sheet. Because subglacial topography influences how ice flows and responds to environmental changes, mapping these massive basins provides critical context for glaciological models.

The discovery sheds new light on Antarctica's ancient tectonic history by providing evidence of the rotational extension that shaped the landmass before it separated from other continents.