Archeologists in China have discovered two perfectly preserved fossils of a new 125 million-year-old dinosaur species.

The new species of burrowing dinosaur was discovered in the Lujiatun Beds, the oldest layers of the famous Yixian Formation in northeast China, according to a news release. Scientists believe that they were trapped by a volcanic eruption while resting at the bottom of their burrows.

“These animals were quickly covered by fine sediment while they were still alive or just after their death,” palaeontologist Pascal Godefroit of the Royal Belgian Institute of Natural Sciences, said.

The scientist said that the effect would be very similar to what happened in Pompeii. The new species was named Changmiania liaoningensis, according to the news release. Changmian means “eternal sleep” in Chinese.

Scientists deduce that the ornithopod lived during the Cretaceous period and that it was a small herbivore that could run very fast, based on the length of its tail and its leg composition. It was about 1.2 meters (about 4 feet) long.

“However, certain characteristics of the skeleton suggest that Changmiania could dig burrows, much like rabbits do today,” Godefroit said.

“Its neck and forearms are very short but robust, its shoulder blades are characteristic of burrowing vertebrates and the top of its snout is shaped like a shovel.”