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  2. Granite - Wikipedia

    en.wikipedia.org/wiki/Granite

    It was long debated whether crustal thickening in orogens (mountain belts along convergent boundaries) was sufficient to produce granite melts by radiogenic heating, but recent work suggests that this is not a viable mechanism. [41] In-situ granitization requires heating by the asthenospheric mantle or by underplating with mantle-derived magmas ...

  3. Decomposed granite - Wikipedia

    en.wikipedia.org/wiki/Decomposed_granite

    Decomposed granite path. Decomposed granite, as a crushed stone form, is used as a pavement building material. It is used on driveways, garden walkways, bocce courts and pétanque terrains, and urban, regional, and national park walkways and heavy-use paths. DG can be installed and compacted to meet handicapped accessibility specifications and ...

  4. Formation of rocks - Wikipedia

    en.wikipedia.org/wiki/Formation_of_rocks

    Rock can also form in the absence of a substantial pressure gradient as material that condensed from a protoplanetary disk, without ever undergoing any transformations in the interior of a large object such as a planet or moon. Astrophysicists classify this as a fourth type of rock: primitive rock. This type is common in asteroids and meteorites.

  5. Igneous rock - Wikipedia

    en.wikipedia.org/wiki/Igneous_rock

    Some kinds of basalt solidify to form long polygonal columns. The Giant's Causeway in Antrim, Northern Ireland is an example. The molten rock, which typically contains suspended crystals and dissolved gases, is called magma. [10] It rises because it is less dense than the rock from which it was extracted. [11]

  6. Stone Mountain - Wikipedia

    en.wikipedia.org/wiki/Stone_Mountain

    This magma solidified to form granite within the crust 5 to 10 miles (8 to 16 km) below the surface. The Stone Mountain pluton continues underground 9 miles (14 km) at its longest point into Gwinnett County. Numerous reference books and Georgia literature have dubbed Stone Mountain as "the largest exposed piece of granite in the world". [9]

  7. Geology of the Rocky Mountains - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_Rocky_Mountains

    The granitoid rocks are mainly potassic granite and were derived principally from reworked older (3.1–2.8 Ga) gneiss. [3] During the Paleoproterozoic, island-arc terrane associated with the Colorado orogeny accreted to the Wyoming Craton along the Cheyenne belt, a 500-km-wide belt of Proterozoic rocks named for Cheyenne, Wyoming.

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  9. Granite dome - Wikipedia

    en.wikipedia.org/wiki/Granite_dome

    Granite domes are domical hills composed of granite with bare rock exposed over most of the surface. Generally, domical features such as these are known as bornhardts . Bornhardts can form in any type of plutonic rock but are typically composed of granite and granitic gneiss . [ 1 ]

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