AnswersInGenitals writes:
The model for the formation of sand can be seen at any mining site. At these sites you will see huge tumblers that are loaded with several tons of large ore rocks and boulders and mixed with large quantities of water, yes, lots of water and then tumbled for several hours, reducing those hunks of rock and boulder to a fine sand like grit.
This is an oppurtunity for experimentation. Does the production rate depend on the amount of water or the time? Can you make more sand faster with more water?
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