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Dust storm on Summer Lake
Flat
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Dried shiny mud
Sevier Lake, Utah
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The Racetrack
The Racetrack
The Racetrack
The Racetrack
The Racetrack
The Racetrack
The Racetrack
The Racetrack
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Unnamed playa off Black Rock
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Jungo playa, Nevada, USA
Shovel on Black Rock Playa
Stagecoach Playa
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Kumiva Flat
Kumiva Flat
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Bluewing Flat
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Road to Bluewing Flat
Black Rock Playa
Black Rock Playa
Black Rock Playa
Black Rock Playa
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Location
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Piękno mojej Ojczyzny, piękno mojego miasta - The beauty of my homeland, the beauty of my city
Piękno mojej Ojczyzny, piękno mojego miasta - The beauty of my homeland, the beauty of my city
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The Racetrack
Death Valley, California, USA. Rocks moving across the playa and leaving a trail. The mechanisms are still controversial, but it seems to occur when there are strong winter winds while the playa is wet and extremely slippery.
It isn't restricted to Racetrack Playa--I've seen similar trails left by things like abandoned tires on other playas. The unusual thing about Racetrack seems to be its being adjacent to cliffy outcrops that can drop rocks on the playa! Most playas are out in the flats, remote from any source of objects that could fall on them to be pushed.
UPDATE: Just in the last couple of years, the stones have finally been seen to move. (Some of them were wired for GPS!) It turns out thin ice sheets are acting as sails:
www.nature.com/news/wandering-stones-of-death-valley-explained-1.15773
As I noted above, I've seen similar trails on other playas, involving things like old tires, so it's not just the Racetrack!
It isn't restricted to Racetrack Playa--I've seen similar trails left by things like abandoned tires on other playas. The unusual thing about Racetrack seems to be its being adjacent to cliffy outcrops that can drop rocks on the playa! Most playas are out in the flats, remote from any source of objects that could fall on them to be pushed.
UPDATE: Just in the last couple of years, the stones have finally been seen to move. (Some of them were wired for GPS!) It turns out thin ice sheets are acting as sails:
www.nature.com/news/wandering-stones-of-death-valley-explained-1.15773
As I noted above, I've seen similar trails on other playas, involving things like old tires, so it's not just the Racetrack!
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