Rock (geology)
From open-encyclopedia.com - the free encyclopedia.
Rock is a substance composed of minerals and classified according to mineral composition. Rocks are generally clasified by the processes that formed them, and are thus separated into igneous, sedimentary, and metamorphic rocks. Igneous rocks are formed from molten magma, sedimentary rocks by deposition and compression of particulate matter, and metamorphic rocks by either of the first two categories after being changed by the effects of temperature and pressure. In cases where organic material leaves behind an imprint of itself in rock, the result is known as a fossil.
See also
- Geology
- List of rocks
- List of minerals and stone types
- List of stone
- Quarrying
bg:Скала
ca:Roca
cy:Cerrig
da:Klippe (geologi)
de:Gestein
es:roca
et:Kivimid
fr:Roche
fi:Kivi
he:סלע
ja:岩石
nl:Rots
pl:Skała (minerał)
pt:Rocha (geologia)
ro:piatră
ms:Batu
