Ammon News - The UK's biggest ever dinosaur trackway site has been discovered in a quarry in Oxfordshire.

About 200 huge footprints, which were made 166 million years ago, criss-cross the limestone floor.

They reveal the comings and goings of two different types of dinosaurs that are thought to be a long-necked sauropod called Cetiosaurus and the smaller meat-eating Megalosaurus.

The longest trackways are 150m in length, but they could extend much further as only part of the quarry has been excavated.

"This is one of the most impressive track sites I've ever seen, in terms of scale, in terms of the size of the tracks," said Prof Kirsty Edgar, a micropalaeontologist from the University of Birmingham.

"You can step back in time and get an idea of what it would have been like, these massive creatures just roaming around, going about their own business."

The tracks were first spotted by Gary Johnson, a worker at Dewars Farm Quarry, while he was driving a digger.

"I was basically clearing the clay, and I hit a hump, and I thought it's just an abnormality in the ground," he said, pointing to a ridge where some mud has been pushed up as a dinosaur's foot pressed down into the earth.

"But then it got to another, 3m along, and it was a hump again. And then it went another 3m - hump again."

Another trackway site had been found nearby in the 1990s, so he realised the regular bumps and dips could be dinosaur footprints.

"I thought I'm the first person to see them. And it was so surreal - a bit of a tingling moment, really," he told BBC News.

This summer, more than 100 scientists, students and volunteers joined an excavation at the quarry which features on the new series of Digging for Britain.

BBC