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The following is a list of rock types recognized by geologists.There is no agreed number of specific types of rock. Any unique combination of chemical composition, mineralogy, grain size, texture, or other distinguishing characteristics can describe a rock type.
The use of rock has had a huge impact on the cultural and technological development of the human race. Rock has been used by humans and other hominids for at least 2.5 million years. [22] Lithic technology marks some of the oldest and continuously used technologies. The mining of rock for its metal content has been one of the most important ...
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.
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 ...
Cumberlandite is a specific type of plutonic rock called a melanocratic troctolite, or melatroctolite. [1] It is the state rock of Rhode Island and can be found in a 4-acre (0.016 km 2 ) lot in Cumberland, Rhode Island at Iron Mine Hill.
Rocks formations and the Dedo de Deus (God's Finger) peak in the background, Serra dos Órgãos National Park, Rio de Janeiro state, Brazil Raouché or Pigeons' Rock in Beirut, Lebanon Druid Arch, Canyonlands National Park, Utah, US View of Meteora, Greece Rock formations in Ongamira Valley, Sierras de Córdoba, Argentina Belogradchik Rocks, Balkan Mountains, Bulgaria "Jaws", an erosional fin ...