Sand
![Sand [[dune](https://upload.wikimedia.org/wikipedia/commons/8/8b/Libya_4608_Idehan_Ubari_Dunes_Luca_Galuzzi_2007.jpg)
The composition of sand varies, depending on the local rock sources and conditions, but the most common constituent of sand in inland continental settings and non-tropical coastal settings is silica (silicon dioxide, or SiO2), usually in the form of quartz.
Calcium carbonate is the second most common type of sand, for example, aragonite, which has mostly been created, over the past 500million years, by various forms of life, like coral and shellfish. For example, it is the primary form of sand apparent in areas where reefs have dominated the ecosystem for millions of years, as in the Caribbean. Somewhat more rarely, sand may be composed of calcium sulfate, such as gypsum and selenite, as is found in places such as White Sands National Park and Salt Plains National Wildlife Refuge in the U.S.
Sand is a non-renewable resource over human timescales, and sand suitable for making concrete is in high demand. Desert sand, although plentiful, is not suitable for concrete. Fifty billion tons of beach sand and fossil sand are used each year for construction. Provided by Wikipedia
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463by Wabakken, Petter, Zimmermann, Barbara, Eriksen, Ane, Maartmann, Erling, Nordli, Kristoffer, Carricondo-Sanchez, David, Sand, Håkan, Wikenros, CamillaGet access
Published 2019
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464by Winther, Jan-Gunnar, Bruland, Oddbjørn, Sand, Knut, Gerland, Sebastian, Marechal, David, Ivanov, Boris, Glowacki, Piotr, König, MaxGet access
Published 2003
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465by Liberg, Olof, Andrén, Henrik, Pedersen, Hans-Christian, Sand, Håkan, Sejberg, Douglas, Wabakken, Petter, Åkesson, Mikael, Bensch, StaffanGet access
Published in Biology Letters (2005)
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466by Gernigon, Laurent, Olesen, Odleiv, Ebbing, Jörg, Wienecke, Susann, Gaina, Carmen, Mogaard, John Olav, Sand, Morten, Myklebust, ReidunGet access
Published in Tectonophysics (2009)
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467by Gernigon, Laurent, Olesen, Odleiv, Ebbing, Jörg, Wienecke, Susann, Gaina, Carmen, Mogaard, John Olav, Sand, Morten, Myklebust, ReidunGet access
Published in Tectonophysics (2009)
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468by Linnell, John D. C., Solberg, Erling J., Brainerd, Scott, Liberg, Olof, Sand, Håkan, Wabakken, Petter, Kojola, IlpoGet access
Published in Acta Zoologica Lituanica (2003)
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473by Revillion, Christophe, Lagadec, Erwan, Le Minter, Gildas, Dessay, Nadine, Guernier, Vanina, Sand, Aurélie, Tortosa, P., Dellagi, Koussay, Herbreteau, VincentGet access
Published 2015
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474by Révillion, Christophe, Lagadec, Erwan, Le Minter, Gildas, Dessay, Nadine, Guernier, Vanina, Sand, Aurélie, Tortosa, Pablo, Dellagi, Koussay, Herbreteau, VincentGet access
Published 2015
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475by Révillion, Christophe, Lagadec, Erwan, Le Minter, Gildas, Dessay, Nadine, Guernier, Vanina, Sand, Aurélie, Tortosa, Pablo, Dellagi, Koussay, Herbreteau, VincentGet access
Published 2015
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476by Révillion, Christophe, Lagadec, Erwan, Le Minter, Gildas, Dessay, Nadine, Guernier, Vanina, Sand, Aurélie, Tortosa, Pablo, Dellagi, Koussay, Herbreteau, VincentGet access
Published 2015
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477by Christophe Révillion, Erwan Lagadec, Gildas Le Minter, Nadine Dessay, Vanina Guernier, Aurélie Sand, Pablo Tortosa, Koussay Dellagi, Vincent HerbreteauGet access
Published in Revue Française de Photogrammétrie et de Télédétection (2015)
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478by Sanz Pérez, Ana, Ordiz, Andres, Sand, Håkan, Swenson, Jon, Wabakken, Petter, Wikenros, Camilla, Zimmermann, Barbara, Åkesson, Mikael, Milleret, CyrilGet access
Published 2018
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480by Wikenros, Camilla, Di Bernardi, Cecilia, Zimmermann, Barbara, Åkesson, Mikael, Flagstad, Oystein, Mattisson, Jenny, Tallian, Aimee, Wabakken, Petter, Sand, HåkanGet access
Published 2023
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