Could wind really provide the force that sets the largest Racetrack Playa boulders in motion?
After analyzing their rock trail map, researchers found that the longest, straightest trails are concentrated in the southeastern part of Racetrack Playa. In this area, wind is channelled through a low point in the mountains, forming a natural wind tunnel. In the central part of the playa two natural wind tunnels focus their energy from different directions. It’s in this area that rock trails are the most convoluted. So the evidence suggests that strong gusts of wind and swirling dust devils, in combination with a slick playa surface may set even the heaviest the rocks in motion. Off they go, scooting along downwind until friction slows them down and they come to rest. There the stones wait for the next time when slippery mud and wind spur them into action again.
