"It preserves a dinosaur nesting ground including delicate and tiny dinosaur skeletons as well as eggs with embryos inside.
It could be that they stayed in the same herd after reaching adulthood, but we don't have information to corroborate that hypothesis," said paleontologist and study co-author Vincent Fernandez of the Natural History Museum in London.
Herd behavior also can protect young and vulnerable individuals from attack by predators."It's a strategy for the survival of a species," Fernandez said.The oldest previous evidence for dinosaur herd behavior was from about 150 million years ago.The nesting ground was situated on the dry margins of a lake featuring ferns and conifers in a warm but seasonal climate.