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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421by Milleret, Cyril, Wabakken, Petter, Liberg, Olof, Åkesson, Mikael, Flagstad, Øystein, Andreassen, Harry Peter, Sand, HåkanGet access
Published 2017
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422by Ordiz, Andres, Milleret, Cyril, Kindberg, Jonas, Månsson, Johan, Wabakken, Petter, Swenson, Jon E., Sand, HåkanGet access
Published in Ecosphere (2015)
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423by Milleret, Cyril, Wabakken, Petter, Liberg, Olof, Åkesson, Mikael, Flagstad, Øystein, Andreassen, Harry Peter, Sand, HåkanGet access
Published in Journal of Animal Ecology (2016)
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424by Di Bernardi, Cecilia, Wikenros, Camilla, Hedmark, Eva, Boitani, Luigi, Ciucci, Paolo, Sand, Håkan, Åkesson, MikaelGet access
Published in Ecology and Evolution (2021)
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425by Albeck, Henrik, Bentzen, Jens, Ockelmann, Hans H., Nielsen, N. Højgaard, Bretlau, Poul, Hansen, H. SandGet access
Published 1993
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426by Milleret, Cyril, Wabakken, Petter, Liberg, Olof, Åkesson, Mikael, Flagstad, Øystein, Andreassen, Harry Peter, Sand, HåkanGet access
Published in Journal of Animal Ecology (2016)
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427by Ordiz, Andrés, Milleret, Cyril, Kindberg, Jonas, Månsson, Johan, Wabakken, Petter, Swenson, Jon E., Sand, HåkanGet access
Published in Ecosphere (2015)
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429by Kuvaas, B., Kristoffersen, Y., Guseva, J., Leitchenkov, G., Gandjukhin, V., Løvås, O., Sand, M., Brekke, H.Get access
Published in Marine Geology (2005)
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430by Leitchenkov, G., Guseva, J., Gandyukhin, V., Grikurov, G., Kristoffersen, Y., Sand, M., Golynsky, A., Aleshkova, N.Get access
Published in Marine Geophysical Researches (2008)
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431by Borba, Marcela Proença, Ballarini, Ana Elisa, Witusk, Joao Paulo Duarte, Lavin, Paris, Van Der Sand, SueliGet access
Published in Current Microbiology (2020)
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432
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433by Lewinschal, Anna, Ekman, Annica M. L., Hansson, Hans-Christen, Sand, Maria, Berntsen, Terje K., Langner, JoakimGet access
Published in Atmospheric Chemistry and Physics (2019)
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434by Lewinschal, Anna, Ekman, Annica M. L., Hansson, Hans-Christen, Sand, Maria, Berntsen, Terje Koren, Langner, JoakimGet access
Published in Atmospheric Chemistry and Physics (2019)
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435by Lewinschal, Anna, Ekman, Annica M. L., Hansson, Hans-Christen, Sand, Maria, Berntsen, Terje Koren, Langner, JoakimGet access
Published in Atmospheric Chemistry and Physics (2019)
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436
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437by Liberg, O, Andren, H, Pedersen, HC, Sand, H, Sejberg, Douglas, Wabakken, P, Åkesson, Mikael, Bensch, StaffanGet access
Published in Biology Letters (2005)
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438by Camilla Wikenros, Malin Aronsson, Olof Liberg, Anders Jarnemo, Jessica Hansson, Märtha Wallgren, Håkan Sand, Roger BergströmGet access
Published in Scientific Reports (2017)
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440