Frog fossils return to Dinosaur National Monument

DINOSAUR — Two slabs of late Jurassic frog fossils have returned to Dinosaur National Monument after more than a decade at the Carnegie Museum of Natural History in Pittsburgh, Pa.
These two rock slabs contain the fossilized skeletons of several small frogs, each about the size of a modern-day tree frog.
Well-preserved frog skeletons such as these seldom occur in the fossil record because frogs are small, their skeletons are delicate and they have cartilage…