Scientists have uncovered a vast, untouched landscape hidden beneath more than a mile of ice in East Antarctica, revealing a “time capsule” of a world that existed before ice claimed the continent. This ancient landscape under Antarctic ice, roughly the size of Belgium, holds clues about the past and future of our planet’s climate. It’s a hidden terrain of rivers, valleys, and mountains frozen in time for over 34 million years.
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Uncovering a Lost World
Imagine peeling back the layers of ice on Antarctica to find a completely different world underneath. That’s essentially what researchers did in a remote region called Wilkes Land. Using advanced technology like satellite data and ice-penetrating radar, they peered through the thick ice sheet to map the land below.
Professor Stewart Jamieson, lead author of the study from Durham University, described it as “uncovering a time capsule.” He noted that the land beneath the East Antarctic ice sheet is less explored than the surface of Mars, highlighting the significance of this discovery.
Rivers, Forests, and Ancient Peaks
The radar scans revealed a dramatic terrain featuring towering elevated blocks, like ancient mountain ranges, measuring up to 105 miles long and 53 miles wide. These are separated by deep valleys, plunging nearly 3,900 feet and stretching up to 25 miles wide.
Before the ice took over, this region was shaped by flowing rivers, creating a landscape resembling the valleys and ridges seen in places like Wales or Scotland today. Fossil pollen found along the nearby Antarctic coast even suggests that lush forests and possibly palm trees once thrived in this area.
Illustration depicting the ancient landscape buried under Antarctic ice, showing rivers flowing through valleys and across ridges before glaciation.
Researchers estimate this preserved terrain spans more than 12,000 square miles.
How Was It Preserved?
Unlike many glaciers that act like giant sandpapers, grinding down the rock beneath them, the ice in this part of East Antarctica is extremely cold and moves incredibly slowly – less than 16 feet per year. This “cold-based” ice sheet is frozen to the ground, causing minimal erosion and perfectly preserving the ancient landforms beneath.
Using satellite imagery to detect subtle surface bumps and computer models, scientists could trace how the landscape has shifted over vast timescales. They found some areas of this buried world have been pushed upward by as much as 1,600 feet over millions of years, a result of the immense weight of the ice pressing down.
Map showing different layers of Antarctica: the surface ice, the topography of the buried ancient landscape beneath, and historical climate data.
A Window into Antarctica’s Past
This discovery offers a rare glimpse into Antarctica’s deep history, long before it became a frozen continent. Tens of millions of years ago, as the supercontinent Gondwana broke apart, Antarctica drifted southward. This movement helped create a powerful ocean current around the continent, isolating it from warmer waters. Combined with dropping atmospheric carbon dioxide levels, the planet cooled, triggering the growth of massive ice sheets.
The research suggests the region initially had flowing rivers and dense forests in a temperate climate. The shifting landmass from Gondwana’s break-up likely created deep cracks, potentially splitting the land into distinct elevated blocks before early glaciers arrived.
These early glaciers, millions of years ago, began carving out the valleys into classic U-shaped formations. Around 14 million years ago, the expanding East Antarctic Ice Sheet finally engulfed the entire area.
Even during warmer periods since then, like the mid-Pliocene around 3 million years ago when global temperatures were higher, this specific region remained locked under ice.
Why This Matters Today
This perfectly preserved ancient landscape is more than just a historical curiosity. It acts as a crucial record of how the East Antarctic Ice Sheet formed and evolved over millions of years.
Understanding the long-term history of the ice sheet, including how it interacted with the land beneath it and survived past warm periods, helps scientists predict how it might behave in response to future climate change. As Earth’s climate warms, insights from this buried world can inform models about the stability of vast ice sheets, including how much ice might melt and contribute to sea-level rise. Learn more about melting glaciers and their impact.
While drilling through more than a mile of ice to reach this lost landscape would be a monumental task, scientists plan to continue exploring it remotely. By filling in the gaps in their surveys, they hope to gain an even clearer picture of this ancient world and its connection to the history and future of Antarctica’s ice.
