Description
"The downward rock bulge from the Late Jurassic (140 to 135 million years ago) in the layers of rock are from a dinosaur walking in soft sand, sinking in and compressing and distorting the layers below. The track was later filled in by more sand and buried by more layers. This bulge best fit the shape of the back of a smaller juvenile brontosaurus dinosaur. The track arrow points to one of the obvious brontosaur bulges and compressed layers."