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A comment on Previous Evidence of Water on Mars Now Identified as Grainflows.

Re:Previous Evidence of Water on Mars Now Identified as Grai... by baldfat on Tuesday November 21, 2017 @07:19AM (#15747372)
Is it like the Sailing Stones we have observed in the desert but with grains of sand?

https://en.wikipedia.org/wiki/Sailing_stones

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Re:Previous Evidence of Water on Mars Now Identified as Grai... by japhyr on Tuesday November 21, 2017 @10:11AM (#15748319)
Those rocks move because they're carried by thin ice sheets every once in a while:

> rocks move when large ice sheets a few millimeters thick floating in an ephemeral winter pond start to break up during sunny days. These thin floating ice panels, frozen during cold winter nights, are driven by wind and shove rocks at up to 5 m/min.

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