Why do grains of sand seem to be one size in dunes and on beaches?

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Offline thedoc

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Scott asked the Naked Scientists:
   Why do grains of sand seem to be one size in dunes and on beaches?
What do you think?
« Last Edit: 29/06/2016 15:50:01 by _system »

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Offline JimBob

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These sands are all one chemical compound and thus, crystal structure.
The mind is like a parachute. It works best when open.  -- A. Einstein

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Offline RD

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« Last Edit: 30/06/2016 04:51:36 by RD »

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Offline evan_au

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Quote from: Scott
Why do grains of sand seem to be one size in dunes and on beaches?
1.Possibly because we can't see them easily with the naked eye, so we don't check their sizes too carefully.

2. Sand grains are sorted by wind and running water. Very small particles tend to be carried much farther than heavier particles. So the sand you see in one location is in that location because of its size.

Oops - crossover with RD...

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Offline JimBob

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Yes, I ignored sorting. BUT the smaller the size-es are also governed by crystal structure
« Last Edit: 04/07/2016 04:31:28 by JimBob »
The mind is like a parachute. It works best when open.  -- A. Einstein