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en.wikipedia.org/wiki/Formation_of_rocks

This article discusses how rocks are formed. There are also articles on physical rock formations, rock layerings (strata), and the formal naming of geologic formations. The three main ways rocks are formed: ... As it moves, it cools and various rock types will form through a process known as fractional crystallization. Igneous ...

en.wikipedia.org/wiki/List_of_rock_types

The following is a list of rock types recognized by petrologists. There is no agreed number of ... Additionally, different classification systems exist for each major type of rock. There are three major types of rock, sedimentary, metamorphic, and igneous. They are all identified by their texture, streak, and location, among other  ...

www.learner.org/interactives/rockcycle/types.html

The three main types, or classes, of rock are sedimentary, metamorphic, and igneous and ... Together, all these particles are called sediment. ... Igneous rocks are formed when magma (molten rock deep within the earth) cools and hardens.

jersey.uoregon.edu/~mstrick/AskGeoMan/geoQuerry13.html

What are the 3 basic types of rocks? ... being, all rocks can be put into one of three fundamentally different types of rocks. ... The earth is made of igneous rock - at least at the surface where our planet is exposed to the coldness of space.

www.amnh.org/exhibitions/permanent-exhibitions/rose-center-for-earth-and-space/david-s.-and-ruth-l.-gottesman-hall-of-planet-earth/how-do-we-read-the-rocks/three-types-of-rock

There are three kinds of rock: igneous, sedimentary, and metamorphic. Igneous rocks form when molten rock (magma or lava) cools and solidifies. Sedimentary ...

www.educ.msu.edu/michiganrocks/MI%20Rocks%20website/3lesson.htm

MI-2: There are three basic types of rocks; each rock type forms under certain ... O -3: Interpret the environment that a particular rock formed in based on rock type ...

www.dummies.com/education/science/the-three-categories-of-rocks-and-the-rock-cycle

Geologists classify the rocks of earth's crust in one of three categories — igneous, metamorphic, or sedimentary — based on how the rock was created. Each type of rock has its own unique characteristics: Igneous: Igneous rocks form from the ...

www.ask.com/youtube?q=How+Are+Each+of+the+Three+Rock+Types+Formed%3F&v=17l2LrjZi9o
Aug 10, 2015 ... Rocks can be broadly divided into three types on the bases of their formation, namely igneous rocks, s... ... Smart Learning for All ... Igneous rocks are formed from magma, which is a molten rock found deep inside the earth.

www.universetoday.com/46594/how-are-rocks-formed

Dec 3, 2009 ... And depending on the type of rock, the process through which they are created varies. In all, there are three types of rocks: igneous, ...

en.wikibooks.org/wiki/Identifying_Rocks_and_Minerals/Types_of_Rocks

There are three different types of rocks: Igneous, Sedimentary, and Metamorphic. The difference between each type is in how they are formed.