A hoodoo is a rock formation caused by a pillar of rock with different resistances to erosion. Some parts of the hoodoo, such as the top are harder then the lower layers and are not able to be eroded by same means as the lower, softer rock. Freeze-thaw, Wind and water both are all erosional forces present in the creation of hoodoos. Wind blows small particles of rock against the lower layers, wearing it away while rain or flash floods pull parts of the soft rock away from the pillar. The freeze thaw cycle weakens the rock, causing some to fall off, or for the other erosional forces to have a larger effect.
I can't believe that a solid rock and rain can form those strange rocky structures.
ReplyDelete