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Sliding Rocks on Racetrack Playa, Death Valley National Park: First Observation of Rocks in Motion

Figure 2

View from the ‘source hill’ on the south shore of Racetrack Playa.

View is looking north on December 20, 2013 at 3:15 pm. Steady, light wind, 4–5 m/s has blown water to the northeast exposing newly formed rock trails. Lower image shows overlay of lines to emphasize the congruent shape of adjacent rock trails as well as the proximity of rock trails to rocks that did not move. Image has not been enhanced.

Figure 2