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Types of rocks

Published on Nov 18, 2015

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1.

Igneous Rocks

Formed from the cooling of lava and magma
Photo by gnuckx
2.

Intrusive Igneous Rocks

Form from magma cooled slowly inside of the Earth (large crystals)
Photo by James Bowe
3.

Extrusive Igneous Rocks

Formed by the cooling of lava outside of the Earth's surface 
Photo by jsj1771
4.

Sedimentary Rocks

Formed by the compaction and cementation of sediments
Photo by james_gordon_losangeles
5.

Clastic Sedimentary Rocks

sediments are compacted and cemented together
Photo by Scott Ingram Photography
6.

Chemical Sedimentary Rocks

form when water evaporates
Photo by jhf
7.

Organic Sedimentary Rocks

form from the remains of fossils, once living plants, and animals (shells)
Photo by mehjg
8.

Metamorphic Rocks

form when rocks are exposed to high temperature and pressure
Photo by siccarpoint
9.

Metamorphic Rocks

  • Foliated: banded
  • Non-foliated: not banded
Photo by Black Country Museums
10.

Contact Metamorphism

form from direct contact with intense heat (from magma)
Photo by gnuckx
11.

Regional Metamorphism

form from the intense pressure of a convergent boundary
Photo by Jesse Varner

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