Thanks for your interest and posts. I never fail to examine your posts. Are you a professional archaeologist? Always amazed at how sites get covered to such depths. I can understand shifting sand in Egypt, but here the stonework goes down five or six feet beneath a level plain. The earth around includes larger stones, so the wind didn’t move them. Whassup?
Rain, other water erosion, earthworms, a little tiny bit of additional debris from space, and sometimes deliberate burial.