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  2. List of rock types - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_types

    Coal – Combustible sedimentary rock composed primarily of carbon; Conglomerate – Sedimentary rock composed of smaller rock fragments; Coquina – Sedimentary rock that is composed mostly of fragments of shells; Diamictite – Type of sedimentary rock; Diatomite – Soft, siliceous sedimentary rock that is easily crumbled

  3. Category:Sedimentary rocks - Wikipedia

    en.wikipedia.org/wiki/Category:Sedimentary_rocks

    العربية; Aragonés; Asturianu; Azərbaycanca; 閩南語 / Bân-lâm-gú; Башҡортса; Беларуская; Беларуская (тарашкевіца)

  4. List of rock formations - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_formations

    Metamorphic rocks are created by rocks that have been transformed into another kind of rock, usually by some combination of heat, pressure, and chemical alteration. Sedimentary rocks are created by a variety of processes but usually involving deposition, grain by grain, layer by layer, in water or, in the case of terrestrial sediments, on land ...

  5. Sedimentary rock - Wikipedia

    en.wikipedia.org/wiki/Sedimentary_rock

    Uluru (Ayers Rock) is a large sandstone formation in Northern Territory, Australia.. Sedimentary rocks can be subdivided into four groups based on the processes responsible for their formation: clastic sedimentary rocks, biochemical (biogenic) sedimentary rocks, chemical sedimentary rocks, and a fourth category for "other" sedimentary rocks formed by impacts, volcanism, and other minor processes.

  6. Clastic rock - Wikipedia

    en.wikipedia.org/wiki/Clastic_rock

    Clastic sediments or sedimentary rocks are classified based on grain size, clast and cementing material composition, and texture. The classification factors are often useful in determining a sample's environment of deposition. An example of clastic environment would be a river system in which the full range of grains being transported by the ...

  7. List of individual rocks - Wikipedia

    en.wikipedia.org/wiki/List_of_individual_rocks

    Anorthosite Moon rock collected by Apollo 16 astronauts. It is approximately 3.9 billion years old and is the largest Moon rock brought from the Moon. Black Rock: Tooele County, Utah, United States: Large rock on the shoreline of Great Salt Lake. Black Stone: Kaaba, Great Mosque, Mecca, Saudi Arabia: A highly respected Islamic stone set in the ...

  8. Rock cycle - Wikipedia

    en.wikipedia.org/wiki/Rock_cycle

    These rocks are fine-grained and sometimes cool so rapidly that no crystals can form and result in a natural glass, such as obsidian, however the most common fine-grained rock would be known as basalt. Any of the three main types of rocks (igneous, sedimentary, and metamorphic rocks) can melt into magma and cool into igneous rocks. [2]

  9. Formation of rocks - Wikipedia

    en.wikipedia.org/wiki/Formation_of_rocks

    Igneous rocks can be seen at mid-ocean ridges, areas of island arc volcanism or in intra-plate hotspots. Metamorphic rocks once existed as igneous or sedimentary rocks, but have been subjected to varying degrees of pressure and heat within the Earth's crust. The processes involved will change the composition and fabric of the rock and their ...

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