A very strange and unsolved phenomenon happens at Racetrack Playa, Death Valley National Park, California where rocks leaves a number and length of tracks.
Sailing stones, sliding rocks, and moving rocks all refer to a geological phenomenon
where rocks move and inscribe long tracks along a smooth valley floor
without human or animal intervention. Tracks from these sliding rocks
have been observed and studied in various locations, including Little
Bonnie Claire Playa in Nevada, and most notably Racetrack Playa, Death Valley National Park, California, where the number and length of tracks are notable. At Racetrack Playa, these tracks have been studied since the early 1900s, yet the origins of stone movement are not confirmed and remain the subject of research for which several hypotheses exist.
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