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What is a trough compass?

Updated: 4/28/2022
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12y ago

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A Yardang is a rock protrusion that has been shaped by the erosion of wind and sand, such that the upwind side is bluff or undercut, and the downwind part is a diminishing blunt ridge.

The compass part comes from the concept that the direction of the prevailing wind may be shown by analysing the effect.

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12y ago
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Q: What is a trough compass?
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