Scenery 4k3D Nature 52HDR nature 874Nature closeup 632Night nature 519
3840 x 2560 | 3398.7 Kb
Downloads: 25|0|25
3840 x 2563 | 2172 Kb | 1|3|756
3840 x 2560 | 2081.8 Kb | 1|1|750
2560 x 1582 | 1673.7 Kb | 4|2|1582
3840 x 2160 | 1665.5 Kb | 1|1|1751
6144 x 3072 | 7103.9 Kb | 0|2|1149
3840 x 1280 | 1861.1 Kb | 2|2|1017
6144 x 3165 | 6128.9 Kb | 2|3|1710
6144 x 2048 | 6963.1 Kb | 0|2|1110
3840 x 2560 | 2751.3 Kb | 1|3|2330
3840 x 2560 | 3286.3 Kb | 0|5|3029
2560 x 1280 | 1556.2 Kb | 0|1|1338
6144 x 3198 | 10725.6 Kb | 3|1|2205
5120 x 3124 | 7985.9 Kb | 1|5|1844
2560 x 1600 | 1029 Kb | 1|1|2265
3000 x 1500 | 2768.4 Kb | 1|1|1461
6144 x 2048 | 7041.6 Kb | 0|0|1256
5120 x 2560 | 6700 Kb | 0|0|1457
6144 x 3072 | 6651.9 Kb | 0|0|1420
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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