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  2. S-type granite - Wikipedia

    en.wikipedia.org/wiki/S-type_granite

    The S-type Granya Granite shows the characteristic white feldspars, grey quartz, and black biotite, the highly reflective mineral is muscovite. The S-type Strathbogie Granite crops out in the Strathbogie Ranges of Australia. A hand sample from the Strathbogie Granite has a porphyritic texture with larger crystal of grey quartz, called ...

  3. Granite - Wikipedia

    en.wikipedia.org/wiki/Granite

    Granite (/ ˈɡrænɪt / GRAN-it) is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground.

  4. Porphyry (geology) - Wikipedia

    en.wikipedia.org/wiki/Porphyry_(geology)

    "Imperial Porphyry" from the Red Sea Mountains of Egypt A waterworn cobble of porphyry Rhyolite porphyry from Colorado; scale bar in lower left is 1 cm (0.39 in). Porphyry (/ ˈ p ɔːr f ə r i / POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass.

  5. Stawamus Chief - Wikipedia

    en.wikipedia.org/wiki/Stawamus_Chief

    Hike. The Stawamus Chief, officially Stawamus Chief Mountain[2] (often referred to as simply The Chief, or less commonly Squamish Chief), is a granitic dome located adjacent to the town of Squamish, British Columbia, Canada. It towers over 700 m (2,297 ft) above the waters of nearby Howe Sound. It is one of the largest granite monoliths in the ...

  6. List of rock types - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_types

    Chert – Hard, fine-grained sedimentary rock composed of cryptocrystalline silica. Claystone – Clastic sedimentary rock composed primarily of clay-sized particles. Coal – Combustible sedimentary rock composed primarily of carbon. Conglomerate – Sedimentary rock composed of smaller rock fragments.

  7. El Capitan - Wikipedia

    en.wikipedia.org/wiki/El_Capitan

    Geology. El Capitan is composed almost entirely of a pale, coarse-grained granite approximately 100 MYA (million years old). In addition to El Capitan, this granite forms most of the rock features of the western portions of Yosemite Valley. A separate intrusion of igneous rock, the Taft Granite, forms the uppermost portions of the cliff face.

  8. Mount Rushmore - Wikipedia

    en.wikipedia.org/wiki/Mount_Rushmore

    This is an accepted version of this page This is the latest accepted revision, reviewed on 9 September 2024. Mountain in the US featuring a sculpture of four presidents For the band, see Mount Rushmore (band). Mount Rushmore National Memorial Shrine of Democracy Tȟuŋkášila Šákpe Mount Rushmore features Gutzon Borglum's sculpted heads of George Washington, Thomas Jefferson, Theodore ...

  9. Pikes Peak granite - Wikipedia

    en.wikipedia.org/wiki/Pikes_Peak_granite

    Pikes Peak granite is a 1.08 billion year old Late-Precambrian geologic formation found in the central part of the Front Range of Colorado. It is a coarse-grained pink to light red syenogranite with minor gray monzogranite , and it has a distinctive brick-red appearance where it outcrops.

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