Geology: Another Catastrophic Rethink
May 23, 2008
Amphitheater-shaped canyons are common throughout the West – and even on Mars. Geologists had them pretty well figured out. Water seeps out the bottom of a wall, weakening the face of a cliff. Gradually, material collapses and leaves a large alcove that continues to recede headward. That idea is now questioned by a new theory […]
