Sources: https://www.livescience.com/34748-what-is-sand-beach-sand.html https://oceanservice.noaa.gov/facts/sand.html https://www.newsweek.com/where-does-sand-come-parrotfish-poop-makes-white-beaches-and-now-scientists-714024 http://seaslyfe.com/sand-can-benefit-your-skin/ https://oceana.org/marine-life/marine-science-and-ecosystems/beach
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