For decades, scientists argued about a mysterious Silverpit crater lying 80 miles off Yorkshire’s coast. Buried 700 meters below the North Sea seabed, the Silverpit crater stretches two miles across and is surrounded by a 12-mile ring of circular faults.

Initially, experts were divided. Some believed the crater formed when an asteroid struck Earth. Others argued it was caused by shifting geological salt deposits deep underground. However, a new study has finally settled the debate. According to researchers led by Uisdean Nicholson of Heriot-Watt University, an asteroid or comet, roughly the size of York Minster, struck the region 43 million years ago.

“This was definitely an exciting moment,” Nicholson said. “It felt like finding a needle in a haystack.”

A Massive Tsunami and Early Mammal Devastation

When the asteroid hit, it smashed into the sea with incredible force. As a result, it triggered a 100-metre-high tsunami, researchers revealed. At the time, the surrounding area was home to early mammals. Although they faced destruction, the event was far less catastrophic than the Chicxulub impact in Mexico, which wiped out the dinosaurs 66 million years ago.

“The Silverpit impact is far smaller, but it’s remarkable,” Nicholson explained. “It remains the only confirmed impact crater near the present-day UK.”

The Discovery That Sparked Debate

The crater was first discovered in 2002 by petroleum geoscientists. At first, its circular shape, central peak, and ring of faults strongly suggested an asteroid strike.

Consequently, early estimates placed its age at over 60 million years, and the findings quickly made headlines. The Guardian even ran a headline that read: “Crater Could Be Asteroid Strike.”

However, not everyone agreed. Professor John Underhill from the University of Edinburgh led those who believed the crater had a much simpler origin — moving salt rocks deep below the seabed.

“I feel like I’m spoiling the party,” Underhill told The Guardian. “It’s a less glamorous explanation, but that’s what the scientific data is saying.”

A Heated Geological Debate

The controversy reached its peak in 2009 during a debate at the Geological Society. Nicholson, then a PhD student, witnessed the intense discussion.

Eventually, members voted on the crater’s origin. The result was clear: 80% supported the salt movement theory, while only 20% believed in the asteroid impact hypothesis.

“Most people preferred the mundane explanation,” Nicholson recalled. “This reflects how scientists often reject more spectacular claims.”

Fresh Evidence Changes the Story

Years later, Nicholson returned to study Silverpit again. Because of his experience in discovering another impact crater in West Africa, he was chosen to lead a new investigation. This time, his team used advanced seismic imaging, microscopic rock analysis, and computer modeling. Ultimately, their research provided the strongest proof yet that Silverpit was indeed created by an asteroid strike, not salt movement.

“There are only 200 confirmed impact craters on land,” Nicholson explained. “Beneath the ocean, there are just 33 identified so far.” He added that most craters disappear over time because erosion and plate tectonics erase the evidence, making such discoveries rare.

Why Silverpit Is So Important

The Silverpit crater is exceptionally well-preserved. Therefore, it gives scientists a rare chance to study Earth’s ancient history.

“We can use these findings to understand how asteroid impacts shaped our planet,” Nicholson said. “It also helps us predict what could happen if another asteroid collides with Earth in the future.”

A Debate Finally Settled

In conclusion, this discovery ends a 20-year scientific debate. It also provides new insight into Earth’s violent past while serving as a warning about the potential dangers of future asteroid strikes.