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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. Additionally, different classification systems exist for each major type of rock. [1]
Volcanic rocks (often shortened to volcanics in scientific contexts) are rocks formed from lava erupted from a volcano. Like all rock types, the concept of volcanic rock is artificial, and in nature volcanic rocks grade into hypabyssal and metamorphic rocks and constitute an important element of some sediments and sedimentary rocks.
In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition, and the way in which it is formed. Rocks form the Earth's outer solid layer, the crust, and most of its interior, except for the liquid outer core and pockets of ...
Rock formations in Ongamira Valley, Sierras de Córdoba, Argentina. Belogradchik Rocks, Balkan Mountains, Bulgaria. "Jaws", an erosional fin in Little Finland, Nevada, US. "Hajdučka vrata" on Čvrsnica, Herzegovina. Paklenica, Croatia. Devil's Town, Serbia. Three Sisters in Blue Mountains, Australia. A rock formation is an isolated, scenic, or ...
Coquina – Sedimentary rock that is composed mostly of fragments of shells. Coral rag – Limestone composed of ancient coral reef material. Chalk – Soft carbonate rock. Fossiliferous limestone – Limestone containing fossils. Lithographic limestone – Type of limestone with hard fine grain. Marble – Metamorphic limestone.
Pages in category "Lists of rocks" ... This list may not reflect recent changes. List of individual rocks; List of rock types; D. List of decorative stones; F.
4 Rocks. 5 Chatoyant gems. 6 Asterism. 7 See also. ... This is a list of gemstones, organized by species and types. Minerals
Igneous rock (igneous from Latin igneus 'fiery'), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet 's mantle or crust.
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