Richard Norris & Jim Norris have uncovered why the stones in Death Valley are able to travel: it is all about ice shoving. no one has been able to find out what happened and I wonder why wouldn’t other guys just film the damn thing for a year.
In any case, here is the explanation from Nature:
Researchers watched a pond freeze atop the playa, then break apart into sheets of ice that — blown by wind — shoved rocks across the lake bed.
Mystery solved, finally.