Rainwater runoff can erode the surface of a water-soluble rock, scarring it with hundreds of parallel channels. Sharp alignment. Natural rillenkarren appear as long, parallel grooves, as seen in these ...
Rainwater runoff can erode the surface of a water-soluble rock, scarring it with hundreds of parallel channels. Sharp alignment. Natural rillenkarren appear as long, parallel grooves, as seen in these ...
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