The research shows that the earliest dinosaur eggs may have had leathery shells, similar to today’s turtle eggs ... dinosaurs ...

The researchers’ initial confusion stemmed from the fact that it did not resemble the typical rigid-shelled eggs seen in many dinosaur fossils ... land like birds or turtles.

The stratum contains many fossils of dinosaurs and other reptiles, including turtle eggs. The fossil excavated in 2003 was stored as a turtle fossil because of its plate-like shape and thickness.