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  2. Red beds - Wikipedia

    en.wikipedia.org/wiki/Red_beds

    Red beds (or redbeds) are sedimentary rocks, typically consisting of sandstone, siltstone, and shale, that are predominantly red in color due to the presence of ferric oxides. Frequently, these red-colored sedimentary strata locally contain thin beds of conglomerate , marl , limestone , or some combination of these sedimentary rocks.

  3. Soil color - Wikipedia

    en.wikipedia.org/wiki/Soil_color

    Highly oxidized red soil in Tirunelveli District, India. Red colors often indicate iron accumulation or oxidation in oxygen-rich, well-aerated soils. [4] Iron concentrations caused by redox reactions because of diffusion of iron in crystalline and metermorphic rock, in periodically saturated soils may also present red colors, particularly along root channels or pores.

  4. Red soil - Wikipedia

    en.wikipedia.org/wiki/Red_soil

    Red soil in India. Red soil is a type of soil that typically develops in warm, temperate, and humid climates and comprises approximately 13% of Earth's soils. [1] It contains thin organic and organic-mineral layers of highly leached soil resting on a red layer of alluvium.

  5. Ultisol - Wikipedia

    en.wikipedia.org/wiki/Ultisol

    Ultisol, commonly known as red clay soil, is one of twelve soil orders in the United States Department of Agriculture soil taxonomy. The word "Ultisol" is derived from "ultimate", because Ultisols were seen as the ultimate product of continuous weathering of minerals in a humid, temperate climate without new soil formation via glaciation .

  6. 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]

  7. Navajo Sandstone - Wikipedia

    en.wikipedia.org/wiki/Navajo_Sandstone

    Initially, this iron accumulated as iron-oxide coatings, which formed slowly after the sand had been deposited. Later, after having been deeply buried, reducing fluids composed of water and hydrocarbons flowed through the thick red sand which once comprised the Navajo Sandstone.

  8. What Foods and Products Have Red Dye No. 3, and Why Did ... - AOL

    www.aol.com/foods-products-red-dye-no-113000079.html

    Red dye No. 3 shows up in a lot of processed foods, Cording says. “Candy is where it’s most commonly seen,” she says. “But it’s also in certain drinks, like oral nutrition supplements ...

  9. Trinitite - Wikipedia

    en.wikipedia.org/wiki/Trinitite

    It is usually a light green, although red trinitite was also found in one section of the blast site, [4] and rare pieces of black trinitite formed. [5] It is mildly radioactive but safe to handle. [ 6 ] [ 7 ] [ 8 ] Pieces of the material remain at the Trinity site as of 2018, [ 9 ] although most of it was bulldozed and buried by the United ...