New Study Maps Hidden Fragments of Gondwana, Revealing a Supercontinent Far Larger Than Previously Thought
Scientists have produced a new map of the ancient supercontinent Gondwana, revealing that enormous pieces of its landmass are still preserved beneath regions of Asia, Europe and North America. The findings suggest Gondwana was considerably larger than conventional reconstructions have shown and may have played a major role in the dramatic environmental and biological changes that transformed Earth more than 500 million years ago.
The study, published on September 10, 2026, in Science Advances, analyzed more than 25,000 volcanic-rock samples from global geochemical databases. Researchers used the chemical signatures and ages preserved in these rocks to identify continental material that had previously been interpreted as ancient oceanic crust or volcanic island chains.
The results dramatically expand the estimated size of Gondwana. Earlier reconstructions suggested that the supercontinent represented roughly 64% of Earth’s continental landmass. The new analysis indicates that Gondwana may have incorporated material equivalent to about 80% of the world’s continental area around 500 million years ago.
One of the most important discoveries concerns a vast region stretching from the Indian subcontinent and Southeast Asia through China and into Kazakhstan. Much of this territory is now hidden beneath younger rocks and major mountain systems, making its ancient history extremely difficult to reconstruct from surface geology alone.
The researchers found that rocks associated with the Himalayan region preserve evidence of a much older continental block. Some of the granites exposed today formed relatively recently, but the rocks from which they originated contain evidence of continental material that formed roughly 700 million to 550 million years ago—a period when Gondwana was assembling.
This discovery also addresses a long-standing geological debate over whether Gondwana should technically be classified as a true supercontinent. The traditional definition has often required a supercontinent to contain at least about 75% of Earth’s continental landmass. Earlier estimates placed Gondwana below that threshold. The new reconstruction pushes it comfortably above it.
Gondwana began assembling hundreds of millions of years ago and eventually brought together the landmasses that would become much of modern Africa, South America, Antarctica, Australia and India. Geological and fossil evidence from these continents has long demonstrated their ancient connections, but the full boundaries of Gondwana have remained uncertain.
The new research suggests that some of the missing territory was not actually lost—it was simply buried, deformed or incorporated into younger geological structures. The researchers were able to recover evidence of these hidden fragments by looking beneath the present-day landscape and examining the geological history recorded in deep crustal rocks.
The findings could have implications far beyond drawing a more accurate ancient map. If Gondwana was as extensive as the new reconstruction suggests, its formation would have affected global plate movements, sea levels, volcanic activity and atmospheric chemistry on a much larger scale than previously appreciated.
The timing is particularly significant because Gondwana was assembling during a crucial period in Earth’s biological history. Between roughly 540 million and 530 million years ago, the planet experienced the Cambrian explosion, when many of the major animal groups that dominate the modern fossil record appeared and diversified. Scientists have long debated what combination of environmental and geological factors drove this transformation.
The researchers propose that the formation of Greater Gondwana may have helped trigger a chain of environmental changes. As the continental blocks came together, tectonic activity reorganized and a huge volcanic arc developed around the supercontinent. The ancient volcanic belt may have stretched for nearly 35,000 kilometres, comparable in scale to today’s Pacific Ring of Fire.
Such extensive volcanic activity could have released large quantities of carbon dioxide and water vapour into the atmosphere. According to the researchers’ interpretation, these changes may have contributed to a transition from an extremely cold “icehouse” Earth toward a warmer greenhouse climate, creating conditions more favourable for the expansion of life.
Scientists caution, however, that the geological reconstruction does not by itself prove that Gondwana caused the Cambrian explosion. Earth’s climate, oceans, atmosphere, plate tectonics and biological evolution interacted in extraordinarily complicated ways during this period. The proposed connection is therefore an important hypothesis rather than a final explanation.
There may also be more pieces of ancient Gondwana still waiting to be identified. Some continental fragments could have been submerged, heavily altered or recycled into Earth’s mantle through plate tectonics. That means the newly calculated 80% figure could ultimately prove to be an underestimate of the supercontinent’s original extent.
The study therefore offers more than a revised map of an ancient continent. It provides a new framework for understanding how Earth’s continents assembled, how enormous tectonic systems reshaped the planet’s climate and atmosphere, and how geological changes may have helped create the conditions for the extraordinary diversification of life more than half a billion years ago.
