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Granite (/ ˈ ɡ r æ n ɪ t / GRAN-it) is a coarse-grained 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. It is common in the continental crust of Earth, where it is found in igneous ...
Panorama of the Rock Arch and Spitzkoppe in the background Panorama of Spitzkoppe and the mountains around The campsite at the foot of Spitzkoppe. The Spitzkoppe (from German for "pointed dome"; also referred to as Spitzkop, Groot Spitzkop, or the "Matterhorn of Namibia") is a group of bald granite peaks or inselbergs located between Usakos and Swakopmund in the Namib desert of Namibia.
Carving stone into sculpture is an activity older than civilization itself, beginning perhaps with incised images on cave walls. [1] Prehistoric sculptures were usually human forms, such as the Venus of Willendorf and the faceless statues of the Cycladic cultures of ancient Greece. Later cultures devised animal, human-animal and abstract forms ...
English: Granite Keystone Bridge in July 2016 This is an image of a place or building that is listed on the National Register of Historic Places in the United States of America . Its reference number is 81000117 .
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.
Gabbro is known in the construction industry by the trade name of black granite. [31] However, gabbro is hard and difficult to work, which limits its use. [32] The term "indigo gabbro" is used as a common name for a mineralogically complex rock type often found in mottled tones of black and lilac-grey.
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Rapakivi granite is an igneous intrusive rock and variant of alkali feldspar granite. It is characterized by large, rounded crystals of orthoclase each with a rim of oligoclase (a variety of plagioclase). Common mineral components include hornblende and biotite. The name has come to be used most frequently as a textural term where it implies ...