What does a sand that is: very well rounded, well sorted, and quartz rich suggest?

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A sand that is very well rounded, well sorted, and quartz rich suggests that it has travelled a great distance in a uniform flow or has had more than one cycle of weathering, transport, and deposition. This is because repeated cycles of transport and weathering tend to round and sort grains, and quartz-rich grains are resistant to chemical weathering and can survive long periods of transport. Therefore, the sand is likely to have been deposited far from its source area.

What Does a Sand That Is: Very Well Rounded, Well