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
Mara
Mara may refer to:
People
Places
Maraã
Maraã is a municipality located in the Brazilian state of Amazonas. Its population was 20,254 (2005) and its area is 16,910 km². Together with the municipality Japurá it forms the microregion Japurá.
References
Mara (album)
Mara is the ninth album by Scottish Celtic rock group Runrig, released in 1995. The title means 'of the sea' in Scots Gaelic. It is the last album featuring Donnie Munro on vocals and the fifth and final album released on Chrysalis records.
Track listing
Personnel
Podcasts:
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by Destroyer 666
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by Lamp Of Thoth
Satans Hammer
by: Destroyer 666Now!
Kick it in!
Above the city the hillside it burns
The witches drink the demon sperm
Conjure the fires that first lit the Earth
Summon lightning to stab at the world
Start the attack!
Fire at will!
Start the attack!
Fire at will!
All right
All I heard was the sound of black fucking jackals
Howling at the moon
Come on evil, take me in your black embrace
Come on evil, spread your demon wings
Come on Christians, say your prayers
You won’t escape Satan’s hammer
Come on evil, take me in your black embrace
Come on evil, spread your demon wings
Come on Christians, say your prayers
You won’t escape Satan’s hammer
Come on evil, take me in your black embrace
Come on evil, spread your demon wings
Come on Christians, say your prayers
You won’t escape Satan’s hammer
In the valley, the destruction it starts
Satan laughs at the bleeding hearts
Mercy’s reserved for the hordes of sluts
They’re on their knees praying and fuck
Start the attack!
Fire at will!
Start the attack!
Fire at will!
Come on evil, Satan’s hammer waits to fall
Come on evil, face our metal storm
Come on evil, take me in your black embrace
Come on evil, spread your demon wings
Come on evil, send your storm troopers’ in
You won’t escape Satan’s hammer
Come on evil, take me in your black embrace
Come on evil, spread your demon wings
Come on Christians, say your prayers