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  2. Unified Soil Classification System - Wikipedia

    en.wikipedia.org/wiki/Unified_Soil...

    sand ≥ 50% of coarse fraction passes No.4 (4.75 mm) sieve clean sand SW well-graded sand, fine to coarse sand SP poorly graded sand sand with >12% fines SM silty sand SC clayey sand Fine grained soils 50% or more passing the No.200 (0.075 mm) sieve silt and clay liquid limit < 50 inorganic: ML silt CL lean clay organic: OL organic silt ...

  3. Soil texture - Wikipedia

    en.wikipedia.org/wiki/Soil_texture

    Soil texture is a classification instrument used both in the field and laboratory to determine soil classes based on their physical texture. Soil texture can be determined using qualitative methods such as texture by feel, and quantitative methods such as the hydrometer method based on Stokes' law .

  4. Sand - Wikipedia

    en.wikipedia.org/wiki/Sand

    Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is defined by its grain size. Sand grains are smaller than gravel and coarser than silt. Sand can also refer to a textural class of soil or soil type; i.e., a soil containing more than 85 percent sand-sized particles by mass. [2]

  5. List of rock textures - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_textures

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  6. Water retention curve - Wikipedia

    en.wikipedia.org/wiki/Water_retention_curve

    In 1907, Edgar Buckingham created the first water retention curve. [2] It was measured and made for six soils varying in texture from sand to clay. The data came from experiments made on soil columns 48 inch tall, where a constant water level maintained about 2 inches above the bottom through periodic addition of water from a side tube.

  7. Decentraland - Wikipedia

    en.wikipedia.org/wiki/Decentraland

    It peels back like an onion, revealing a Randian fever-dream built with Roblox textures". [13] According to Eric Ravenscraft of Wired, activity on the platform is unclear, with the world mostly empty and with a number of concurrent users of around 1,600 in 2021, a figure that might include inactive users who remain logged on. [5]

  8. Igneous textures - Wikipedia

    en.wikipedia.org/wiki/Igneous_textures

    Igneous textures include the rock textures occurring in igneous rocks. Igneous textures are used by geologists in determining the mode of origin of igneous rocks and are used in rock classification. The six main types of textures are phaneritic, aphanitic, porphyritic, glassy, pyroclastic, and pegmatitic.

  9. Desert sand (color) - Wikipedia

    en.wikipedia.org/wiki/Desert_sand_(color)

    Desert is a color that resembles the color of the flat areas of a desert.. The first recorded use of desert as a color name in English was in 1920. [12]The normalized color coordinates for desert are identical to fallow, wood brown and camel, which were first recorded as color names in English in 1000, [13] 1886, [14] [a] and 1916, [16] respectively.