Sliding Rocks on Racetrack Playa, Death Valley National Park: First Observation of Rocks in Motion Norris, Richard D. ; Norris, James M. ; Lorenz, Ralph D. ; Ray, Jib ; Jackson, Brian Abstract Publication: PLoS ONE Pub Date: August 2014 DOI: 10.1371/journal.pone.0105948 Bibcode: 2014PLoSO...9j5948N