Steep Mountain Slopes Have Surprisingly Long Lifetimes

Source: Geophysical Research Letters Gravity and rock physics say slopes steeper than about 30 ° —known as the critical threshold angle, or the angle of repose — shouldn’t really exist, yet they do. These steep slopes and near-vertical cliffs can be seen in the Himalayas and in Yosemite National Park, for example. For some geologists, … Read more