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Wikipedia: Sandstone (sometimes known as arenite) is a sedimentary rock composed mainly of sand-sized minerals or rock grains. Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any color, but the most common colors are tan, brown, yellow, red, gray and white.
![[Sandstone Rock-cut tombs (Kokhim) in Petra (Jordan)]](http://images.ookaboo.com/photo/s/PetraSandStoneRock_cut_tombs_s.jpg "Sandstone Rock-cut tombs (Kokhim) in Petra (Jordan)")
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![[Prepared sample of sandstone]](http://images.ookaboo.com/photo/s/USDA_Mineral_Sandstone_93c3955_s.jpg "Prepared sample of sandstone")
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 from Etan J. Tal |
 from Solipsist |
![[Sandstone composed mainly of quartz grains]](http://images.ookaboo.com/photo/s/Sandstone_28quartz_29USGOV_s.jpg "Sandstone composed mainly of quartz grains")
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![[Red sandstone interior of Lower Antelope Canyon, Arizona, worn smooth by erosion from flash flooding over millions...]](http://images.ookaboo.com/photo/s/Lower_antelope_2_md_s.jpg "Red sandstone interior of Lower Antelope Canyon, Arizona, worn smooth by erosion from flash flooding over millions...")
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from Saperaud |
from Moondigger |
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