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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203by Zimmermann, Barbara, Wikenros, Camilla, Sand, Håkan, Eriksen, Ane, Wabakken, PetterGet access
Published 2019
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204Mobility of moose-comparing the effects of wolf predation risk, reproductive status, and seasonalityby Wikenros, Camilla, Balogh, Gyöngyvér, Sand, Håkan, Nicholson, Kerry, Månsson, JohanGet access
Published in Ecology and Evolution (2016)
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206by Gicquel, Morgane, Sand, Håkan, Månsson, Johan, Wallgren, Martha, Wikenros, CamillaGet access
Published 2020
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208by Håkan Sand, Ann Eklund, Barbara Zimmermann, Camilla Wikenros, Petter WabakkenGet access
Published in PLOS ONE (2016)
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209by Wikenros, Camilla, Sand, Håkan, Bergström, Roger, Liberg, Olof, Chapron, GuillaumeGet access
Published 2015
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210by Wikenros, Camilla, Sand, Håkan, Bergström, Roger, Liberg, Olof, Chapron, GuillaumeGet access
Published in PLOS ONE (2015)
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211by Camilla Wikenros, Håkan Sand, Roger Bergström, Olof Liberg, Guillaume ChapronGet access
Published in PLOS ONE (2015)
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212by Petter Wabakken, Camilla Wikenros, Håkan Sand, Barbara Zimmermann, Ann EklundGet access
Published in PLOS ONE (2016)
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217by Sand, Håkan, Eklund, Ann, Zimmermann, Barbara, Wikenros, Camilla, Wabakken, PetterGet access
Published 2017
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218by Bonath, Victoria, Petrich, Christian, Sand, Bjørnar, Fransson, Lennart, Cwirzen, AndrzejGet access
Published in Cold Regions Science and Technology (2018)
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