|Image Name||Width x Height||Size|
|SIA3571.jpg||640 x 439||73K|
|SIA3571.jpg||1200 x 822||238K|
|SIA3571.jpg||3411 x 2334||1M|
The underside of this sandstone ledge contains downward bulges formed as a large animal (probably a brontosaur) walked on soft ground, pushing down and distorting the layers below. These tracks were made more than 150 million years ago.