I can find very little about these stone circles in Saudi. I wonder if these are actually the tops of walls that are just starting to be uncovered as the sands shift.
Unsung CrossroadsDuring the Chalcolithic, or Copper, Age, approximately 6000 years ago, the population of al-Jawf laboriously erected 54 groups of squared-off stone pillars, some of which measured up to three meters (9'6") in height. Called al-rajajil ("the men") today, the pillars appear to the casual observer to be randomly placed, although a bird's-eye view shows that they are placed in roughly parallel east-west lines.
by David W. Tschanz