Uploaded March 2016 | Updated September 2026, 2 weeks ago

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Rocks are awesome! They can be found everywhere on earth and come in many different shapes, forms, and textures. There are three main types of rock: igneous, sedimentary, and metamorphic. Learn more about these types of rock, how they are formed, some examples of each type, and how the rock cycle works to change one type of rock into another.

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Music: Jaunty Gumption, Unwritten Return - Kevin MacLeod (incompetech.com)

Some footage provided by the US Geological Survey

Image Sources:
commons.wikimedia.org/wiki/Sedimentary_rock#/media/File:Banded_iron_formation.jpg
commons.wikimedia.org/wiki/Sedimentary_rock#/media/File:Banded_iron_formation.jpg
en.wikipedia.org/wiki/Metamorphic_rock#/media/File:Quartzite.jpg
en.wikipedia.org/wiki/Igneous_rock#/media/File:Igneous_rock_eng_text.jpg
en.wikipedia.org/wiki/Granite#/media/File:Fj%C3%A6regranitt3.JPG
commons.wikimedia.org/wiki/Category:Tuff#/media/File:HK_LukChauShan_Tuff_1.JPG
en.wikipedia.org/wiki/Obsidian#/media/File:Lipari-Obsidienne_(5).jpg
commons.wikimedia.org/wiki/Category:Glasses_of_water#/media/File:Mud_and_water_suspension_and_clear_water.JPG
en.wikipedia.org/wiki/Sedimentary_rock#/media/File:Pressure_solution_sandstone.svg
commons.wikimedia.org/wiki/Category:Lake_sediments#/media/File:Arch%C3%A4ologie_im_Parkhaus_Op%C3%A9ra_-_Originalschichten_Rettungsgrabung_2010_mit_Kulturschichten_(dunkel)_und_Seekreidablagerungen_(hell)_-_%27Zwischenfutter%27_Hirschgeweih-Steinbeil_2013-03-04_16-24-44_(P7700).JPG
en.wikipedia.org/wiki/Sedimentary_rock#/media/File:Fossils_in_a_beach_wall.JPG
commons.wikimedia.org/wiki/Category:Valued_images_of_fossils#/media/File:Betelgeusia_orientalis_MHNT.PAL.2010.2.1.jpg
commons.wikimedia.org/wiki/Category:Limestone#/media/File:Dolomitic_Limestone.JPG
commons.wikimedia.org/wiki/Category:Oil_shale#/media/File:Oil_shale_Colorado.JPG
en.wikipedia.org/wiki/Metamorphic_rock#/media/File:Migma_ss_2006.jpg
commons.wikimedia.org/wiki/Category:Quartzite#/media/File:Folded_Rock_on_Belle-Ile_Brittany_France.jpg
en.wikipedia.org/wiki/Metamorphic_rock#/media/File:Rock_contact_metamorphism_eng_big_text.jpg
en.wikipedia.org/wiki/Gneiss#/media/File:Orthogneiss_Geopark.jpg
commons.wikimedia.org/wiki/Category:Slate#/media/File:Gray_Slate.JPG
commons.wikimedia.org/w/index.php?title=Category:Sandstone&filefrom=Light+and+Shadow+over+sandstone.jpg#/media/File:SmallCrater05_ST_08.JPG
commons.wikimedia.org/wiki/Category:Quartzite#/media/File:Pink_Quartzite.JPG
commons.wikimedia.org/wiki/Category:Marble_samples#/media/File:Museo_de_La_Plata_-_M%C3%A1rmol_blanco.jpg
en.wikipedia.org/wiki/Magma#/media/File:Pahoehoe_toe.jpg
commons.wikimedia.org/wiki/Category:Sedimentary_rocks#/media/File:Courthouse_Rock,_Sedona_Arizona.JPG
commons.wikimedia.org/wiki/File:Ch%C3%BDnovsk%C3%A1_jeskyn%C4%9B(4).jpg?fastcci_from=114817&c1=114817&d1=15&s=200&a=fqv