In geology terms, it's classified as a monocline — a bend in the rock layers. It was formed around 50 to 70 million years ago when movement in a nearby fault forced the western portion to move ...

The billowy Wingate to your left, the imposing Navajo Sandstone ridge to your right, and the Kayenta sandwiched in between. This fold, or monocline, stretches nearly 100 miles north to south, from ...