[cinFLA]

For example the sphinx - that is water erosion, and there is no way that you can escape from the *fact* that it is water erosion...

Either Discovery or the History Channel had a mention of this last week. They mention natural erosion; I don't remember whether they clarified as to wind or water.

[NotQuiteCricket]

Do a google image search on water erosion, and wind erosion - then take a gander at the erosion on the sphinx.