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Rocks Rocks Rocks!

this describes the changes rocks make to get to the surface, and look the way they do now.

lyric grigsby

on 20 April 2010

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Transcript of Rocks Rocks Rocks!

Different kinds of rocks, and how they get here! By Lyric Grigsby Igneous Rocks Sedimentary rocks Metamorphic Rocks The Rock Cycle "Ignis" meaning fire, is formed by lava or magma cooling and becoming solid. Intrusive igneous rocks are formed from magma that cools and solidifies within the crust of the planet. Since they form near pre-existing rock, the result of the rock is coarse grained. Close up of an igneous intrusive rock (granite) An extrusive igneous rock (Basalt) Light colored tracks show the direction of lava flow. Extrusive igneous rocks are formed at the crusts surface, as a result of the partial melting of rocks within the mantle and crust.Extrusive igneous rocks cool and solidify quicker than intrusive rocks, and as a result they are fine grained. Sedimentary rock is formed by sediments of material at the Earth's surface. (Dirt, remains of animals and plants etc.) Before being deposited sediment was formed by weathering and erosion, then transported to the place of deposition by nature. (water, wind, mass movement, glacires etc.) This particular sedimentary rock was formed by wind sand and water. As you can see, most sedimentary rocks come in huge canyons like theese, and have many smooth layers. Antelope Canyon Metamorphic rock is the result of the transformation of an existing rock type (the protolith) in a prossess called metamorphism which means "to change in form" They are formed by being deep under Earth's surface, subjected to high tempetures, and put under the great pressure of the rock layers above it. They are also formed when rock is heated up by intrusion of hot molten rock called magma. Metamorphic rocks like this one can easily be found, and already seen in your neighboor's yard. Theese are many types of metamorphic rock that all look different from eachother. This shows that metamorphic rock can come in many colors, shapes and sizes. The rock cycle shows the order in which Igneous,Sedimentary, or Metamorphic rock undergo transformations, and changes to get to where they are now...the surface! This rock cycle shows you the cycle of how a rock gets to the surface or even under it! This rock cycle shows what transformations the rocks go through to turn into a different rock.
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