Rock (geology)
In geology, rock or stone is a naturally occurring solid aggregate of one or more minerals or mineraloids. For example, the common rock granite is a combination of the quartz, feldspar and biotite minerals. The Earth's outer solid layer, the lithosphere, is made of rock.
Rocks have been used by mankind throughout history. From the Stone Age, rocks have been used for tools. The minerals and metals found in rocks have been essential to human civilization.
Three major groups of rocks are defined: igneous, sedimentary, and metamorphic. The scientific study of rocks is called petrology, which is an essential component of geology.
Classification
At a granular level, rocks are composed of grains of minerals, which, in turn, are homogeneous solids formed from a chemical compound that is arranged in an orderly manner. The aggregate minerals forming the rock are held together by chemical bonds. The types and abundance of minerals in a rock are determined by the manner in which the rock was formed. Many rocks contain silica (SiO2); a compound of silicon and oxygen that forms 74.3% of the Earth's crust. This material forms crystals with other compounds in the rock. The proportion of silica in rocks and minerals is a major factor in determining their name and properties.
Stone (disambiguation)
A stone is a small piece of rock.
Stone or stones may also refer to:
Materials and minerals
Unit of measurement
Geography
England
United States
People
Stones (surname)
Stones is a surname. Notable people with the surname include:
See also
Atrox
Atrox is an avant-garde metal band from Trondheim, Norway. The group originally formed under the name "Suffocation" but soon changed it because of numerous other bands with the same name. Formed in 1988, the band released its first material only in 1997, and followed it with two releases on notable French metal label, Season of Mist. While their early releases are firmly rooted in death metal, later releases incorporate more progressive elements.
Members
Current
-viNd- - Guitars
Rune Sørgård - guitars, Programming
Tor Arne Helgesen - Drums
Erik Paulsen - Bass
Rune Folgerø - lead vocals
Per Spjøtvold - Keyboard, backing vocals
Former
Ole Marius Larmerud - Guitars (2002–2005)
Monika Edvardsen - Vocals, Keyboard (1996–2004)
Pete Beck - Vocals, Bass (2002–2004)
Daniel Stavsøyen - Bass (2001–2002)
Tom Wahl - Bass (1999)
Dag Rune Øyan - Guitars (1995–1999)
Lars Halvard Søndrol - Drums (1994–1999)
Tommy Sebastian Halseth - Bass (1995–1999)
Geir Tore Johansen - Vocals (1988–1997)
Svenn Tore Mauseth Bass (1988–1995)
Tor-Helge Skei - Guitars (1988–1994)
Tomas Smagersjø - Drums (1993)
Geir Knarrbakk - Drums (1988–1992)
Gunder Audun Dragsten - Guitars (1988–1990)
Podcasts:
