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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.

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.

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.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.ask.com/youtube?q=How+Are+Each+of+the+Three+Rock+Types+Formed%3F&v=EGK1KkLjdQY
Mar 14, 2016 ... There are three main types of rock: igneous,. ... how they are formed, some examples of each type, and how the rock cycle works to change one ...
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 ... Smart Learning for All ... Rocks can be broadly divided into three types on the bases of their formation, namely igneous rocks, sedimentary rocks and ...