🌧️ Why Waterfalls Appear Along the Colorado River (Glen Canyon Dam, Arizona) These stunning waterfalls that sometimes appear along the canyon walls near Glen Canyon Dam are not permanent — they form during intense rainfall or monsoon storms when the desert terrain can’t absorb water fast enough. The canyon walls are made of Navajo Sandstone, a porous rock that becomes quickly saturated during heavy rain. When this happens, the excess water flows directly over the cliffs, creating temporary wate

Glen Canyon Dam conducts a high flow water release