sand

[kopend]

where does sand come from
(if it is from pebbles that have gradually been ground down by the sea over millions of years.)
where does it come from to make deserts. i think some dont even have a coast line

[hammerman]

Does it not come from rock that has been eroded for millions of years by wind, frost and scorching sun ?

[wildwood]

Yes, sand is ground down rock and other minerals. The deserts used to be sea/ocean millions of years ago.