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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601Data from: Competition between apex predators? Brown bears decrease wolf kill rate on two continentsby Tallian, Aimee, Ordiz, Andres, Metz, Matthew C., Milleret, Cyril, Wikenros, Camilla, Smith, Douglas W., Stahler, Daniel R., Kindberg, Jonas, MacNulty, Daniel R., Wabakken, Petter, Swenson, Jon E., Sand, HåkanGet access
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602Data from: Competition between apex predators? Brown bears decrease wolf kill rate on two continentsby Tallian, Aimee, Ordiz, Andres, Metz, Matthew C., Milleret, Cyril, Wikenros, Camilla, Smith, Douglas W., Stahler, Daniel R., Kindberg, Jonas, MacNulty, Daniel R., Wabakken, Petter, Swenson, Jon E., Sand, HåkanGet access
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603Data from: Competition between apex predators? Brown bears decrease wolf kill rate on two continentsby Tallian, Aimee, Ordiz, Andres, Metz, Matthew C., Milleret, Cyril, Wikenros, Camilla, Smith, Douglas W., Stahler, Daniel R., Kindberg, Jonas, MacNulty, Daniel R., Wabakken, Petter, Swenson, Jon E., Sand, HåkanGet access
Published 2017
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604by Tallian, Aimee, Ordiz, Andrés, Metz, Matthew C., Milleret, Cyril, Wikenros, Camilla, Smith, Douglas W., Stahler, Daniel R., Kindberg, Jonas, MacNulty, Daniel R., Wabakken, Petter, Swenson, Jon E., Sand, HåkanGet access
Published in Proceedings of the Royal Society B: Biological Sciences (2017)
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605by Tallian, Aimee, Ordiz, Andrés, Metz, Matthew C., Milleret, Cyril, Wikenros, Camilla, Smith, Douglas W., Stahler, Daniel R., Kindberg, Jonas, MacNulty, Daniel R., Wabakken, Petter, Swenson, Jon E., Sand, HåkanGet access
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606by Tallian, Aimee, Ordiz, Andrés, Metz, Matthew C., Milleret, Cyril, Wikenros, Camilla, Smith, Douglas W., Stahler, Daniel R., Kindberg, Jonas, MacNulty, Daniel R., Wabakken, Petter, Swenson, Jon E., Sand, HåkanGet access
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607by Douglas W. Smith, Petter Wabakken, Camilla Wikenros, Jon E. Swenson, Håkan Sand, Aimee Tallian, Matthew C. Metz, Daniel R. MacNulty, Andrés Ordiz, Jonas Kindberg, Cyril Milleret, Daniel R. StahlerGet access
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608by Aimee Tallian, Andrés Ordiz, Matthew C. Metz, Cyril Milleret, Camilla Wikenros, Douglas W. Smith, Daniel R. Stahler, Jonas Kindberg, Daniel R. MacNulty, Petter Wabakken, Jon E. Swenson, Håkan SandGet access
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609by Aimee Tallian, Andrés Ordiz, Matthew C. Metz, Cyril Milleret, Camilla Wikenros, Douglas W. Smith, Daniel R. Stahler, Jonas Kindberg, Daniel R. MacNulty, Petter Wabakken, Jon E. Swenson, Håkan SandGet access
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610by Aimee Tallian, Andrés Ordiz, Matthew C. Metz, Cyril Milleret, Camilla Wikenros, Douglas W. Smith, Daniel R. Stahler, Jonas Kindberg, Daniel R. MacNulty, Petter Wabakken, Jon E. Swenson, Håkan SandGet access
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611by Aimee Tallian, Andrés Ordiz, Matthew C. Metz, Cyril Milleret, Camilla Wikenros, Douglas W. Smith, Daniel R. Stahler, Jonas Kindberg, Daniel R. MacNulty, Petter Wabakken, Jon E. Swenson, Håkan SandGet access
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613by Njor, Sisse Helle, Heinävaara, Sirpa, Stefansdóttir, Hrefna, Nygård, Mari, Guðmundsdóttir, Eva María, Bhargava, Sameer, Leivonen, Aku, Campbell, Suzanne, Søborg, Bo, Hofvind, Solveig Sand-Hanssen, Sarkeala, Tytti, Vejborg, Ilse, Lamminmäki, MaaritGet access
Published in Preventive Medicine Reports (2023)
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614by Tallian, Aimee, Ordiz, Andrés, Metz, Matthew C., Milleret, Cyril, Wikenros, Camilla, Smith, Douglas W., Stahler, Daniel R., Kindberg, Jonas, MacNulty, Daniel R., Wabakken, Petter, Swenson, Jon E., Sand, HåkanGet access
Published in Proceedings of the Royal Society B: Biological Sciences (2017)
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615by Eriksen, Ane, Wabakken, Petter, Zimmermann, Barbara, Andreassen, Harry P., Arnemo, Jon Martin, Gundersen, Hege, Liberg, Olof, Linnell, John, Milner, Jos M., Pedersen, Hans Christian, Sand, Håkan, Solberg, Erling J., Storaas, TorsteinGet access
Published in Animal Behaviour (2011)
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616by Ane Eriksen, Erik Versluijs, Boris Fuchs, Barbara Zimmermann, Petter Wabakken, Andrés Ordiz, Peter Sunde, Camilla Wikenros, Håkan Sand, Benjamin Gillich, Frank Michler, Kristoffer Nordli, David Carricondo-Sanchez, Lucrezia Gorini, Siegfried RiegerGet access
Published in Frontiers in Ecology and Evolution (2022)
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617by Ane Eriksen, Erik Versluijs, Boris Fuchs, Barbara Zimmermann, Petter Wabakken, Andrés Ordiz, Peter Sunde, Camilla Wikenros, Håkan Sand, Benjamin Gillich, Frank Michler, Kristoffer Nordli, David Carricondo-Sanchez, Lucrezia Gorini, Siegfried RiegerGet access
Published 2022
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618by Ane Eriksen, Erik Versluijs, Boris Fuchs, Barbara Zimmermann, Petter Wabakken, Andrés Ordiz, Peter Sunde, Camilla Wikenros, Håkan Sand, Benjamin Gillich, Frank Michler, Kristoffer Nordli, David Carricondo-Sanchez, Lucrezia Gorini, Siegfried RiegerGet access
Published 2022
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619by Ane Eriksen, Erik Versluijs, Boris Fuchs, Barbara Zimmermann, Petter Wabakken, Andrés Ordiz, Peter Sunde, Camilla Wikenros, Håkan Sand, Benjamin Gillich, Frank Michler, Kristoffer Nordli, David Carricondo-Sanchez, Lucrezia Gorini, Siegfried RiegerGet access
Published 2022
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620by Ane Eriksen, Erik Versluijs, Boris Fuchs, Barbara Zimmermann, Petter Wabakken, Andrés Ordiz, Peter Sunde, Camilla Wikenros, Håkan Sand, Benjamin Gillich, Frank Michler, Kristoffer Nordli, David Carricondo-Sanchez, Lucrezia Gorini, Siegfried RiegerGet access
Published 2022
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