Gorges and especially canyons inspire awe and wonder in most who view them, followed by introspection and inevitably questions regarding how such a spectacle might have come about. Up till now, the most common answer has been simple erosion—water flowing over a long enough period of time can cut even the hardest of rock. More recently, however, new evidence has suggested that some gorges were actually created by groundwater movement. And now, in this new effort, the research team suggests that some of them might have come about due to massive floods.
Read more at: Phys.org