Everything has its pecking order, and geology is no exception. The cocks of the rocks are the big, swaggering periods of the past that fill books, television programmes and natural-history museums.

That swim tracks made by tetrapods occur in high numbers in deposits from the Early Triassic is well known. What is less clear is why the tracks are so abundant and well preserved. Paleontologists ...

A project spanning countries, years and institutions has attempted to reconstruct what the southern end of the world looked like during the Triassic period, 252 to 199 million years ago. After a great ...

Some ancient tracks in Capitol Reef National Park were “impressed into a muddy matrix and later filled in with a fine sand,” the National Park Service says. It's not clear if these were the stolen ...

More than 200 million years ago, at the dawn of the Mesozoic era, Southern Nevada was beachfront property, with tidal flats at today's California border. It was a time known as the Age of Reptiles, as ...