Scenery 4k3D Nature 52HDR nature 873Nature closeup 627Night nature 519
5000 x 3430 | 4448.3 Kb
Downloads: 2|10|4834
4500 x 3140 | 13371 Kb | 10|6|6276
4752 x 3168 | 10004.1 Kb | 3|4|1241
3872 x 2582 | 3804.6 Kb | 5|4|2531
2000 x 1334 | 1132.7 Kb | 3|3|4982
4199 x 2362 | 3732.8 Kb | 1|3|2542
1920 x 1080 | 1375.7 Kb | 1|3|2580
3745 x 2500 | 3794.7 Kb | 8|2|4392
2880 x 1920 | 3751.4 Kb | 2|2|3831
6000 x 4000 | 15522.2 Kb | 1|2|2104
3601 x 2400 | 5007.1 Kb | 3|0|3643
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. The second most common type of sand is calcium carbonate, for example aragonite, which has mostly been created, over the past half billion years, by various forms of life, like coral and shellfish.
Sand is a non renewable resource over human timescales, and sand suitable for making concrete is in high demand. 2017-07-31
See the Wikipedia page for more information.
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