Scarp of the 1959 Hebgen Lake Earthquake (M7.1) running through an old campground in the Middle Rocky Mountains. The flat at lower right was at the same level as the flat at left that the trees are growing on. A large landslide killed many campers and dammed the Madison River, forming Earthquake Lake which, after the disaster years before from the failure of a dam formed by the Gros Ventre slide, was quickly engineered by the Corps of Engineers into a stable dam. The face of the scarp when formed was nearly vertical and devoid of vegetation (Photos at Univ. of Utah).