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Endpoint: Stone / Rock



created on: 23/06/2022
by: Lo55o (12474)
 
 

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In geology, a 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 magma in the asthenosphere.

Rocks are usually grouped into three main groups: igneous rocks, sedimentary rocks and metamorphic rocks. Igneous rocks are formed when magma cools in the Earth's crust, or lava cools on the ground surface or the seabed. Sedimentary rocks are formed by diagenesis and lithification of sediments, which in turn are formed by the weathering, transport, and deposition of existing rocks. Metamorphic rocks are formed when existing rocks are subjected to such high pressures and temperatures that they are transformed without significant melting. This occurs, for example, when continental plates collide.

The scientific study of the character and origin of rocks is called petrology, which is an essential subdiscipline of geology.
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Item number : 49713

Submitted by : Lo55o (12474)
on : 23/06/2022
Refined by : Lo55o (12474)
Last updated on: 23/06/2022