::Rock (geology)


Rocks::minerals    Geology::crust    Mining::igneous    Mining::formed    Title::rocks    Thumb::first

{{#invoke:Hatnote|hatnote}} {{#invoke:Hatnote|hatnote}}

  1. REDIRECT {{#invoke:Pp-move-indef|main}}

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.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

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.

Rock (geology) sections
Intro  Classification  Human use   See also    References   External links  

PREVIOUS: IntroNEXT: Classification