Sand - why do we see such variations?

Sand - why do we see such variations?

7 Minuten

Beschreibung

vor 3 Jahren

Why do we see such variation in the sand around the world -
white, yellow, black and green, and more!  What can the
grains of sand tell us about the age of the sand?   And how
can sand on an island that contains just black rocks have white
sand?   

This one is for the sand collectors!




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