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Atlas of Igneous and Metamorphic Rocks; A nice gallery of igneous rocks in thin section. A good way to get a closer look at the common igneous rocks ... Igneous Rocks - Encyclopedia Britannica; A very comprehensive discussion of igneous rocks. For teachers, or high school students;
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geology.csupomona.edu/alert/igneous/ignrxs.htm
geology.csupomona.edu/alert/igneous/ignrxs.htm
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Glassy textured igneous rocks are non-crystalline meaning the rock contains no mineral grains. Glass results from cooling that is so fast that minerals do not have a chance to crystallize. This may happen when magma or lava comes into quick contact with much cooler materials near the Earth's surface.
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geology.csupomona.edu/alert/igneous/texture.htm
geology.csupomona.edu/alert/igneous/texture.htm
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The three great rock classes--igneous, sedimentary and metamorphic--are introduced with igneous rocks. ... Origin of Igneous Rocks ... Where Igneous Rocks Are Found...
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geology.about.com/cs/basics_roxmin/a/aa011804a.htm
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The Rock Cycle is a group of changes. Igneous rock can change into sedimentary rock or into metamorphic rock. Sedimentary rock can change ... The rock cycle continues. Mountains made of metamorphic rocks can be broken up and washed away by streams. New sediments from these mountains can make new sedimentary rock.
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www.cotf.edu/ete/modules/msese/earthsysflr/rock.html
www.cotf.edu/ete/modules/msese/earthsysflr/rock.html
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Extrusive and Intrusive Igneous Rocks - home page; Volcanos and Extrusive Igneous Rocks; Batholiths, sills, dikes, and other Intrusive Igneous Rock bodies; Igneous rock recognition and identification; Igneous Rock Formation and Distribution;
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csmres.jmu.edu/geollab/Fichter/IgnRx/Ighome.html
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Igneous Rocks are formed by crystallization from a liquid, or magma. They include two types ... or extrusive igneous rocks form when the magma cools and crystallizes on the surface of the Earth ; ... or plutonic igneous rocks wherein the magma crystallizes at depth in the Earth.
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www.tulane.edu/~sanelson/geol111/igneous.htm
www.tulane.edu/~sanelson/geol111/igneous.htm
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Igneous rocks make up 95% of the rocks of the crust of the earth. They are also some of the oldest rocks that are found at the surface of the earth. Igneous rocks are classed on the basis of where they form and the compostion of the molten rock.
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www.usoe.k12.ut.us/curr/science/sciber00/8th/earth/scib...
www.usoe.k12.ut.us/curr/science/sciber00/8th/earth/sciber/rocks2.htm
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Igneous rocks form when molten lava (magma) cools and turn to solid rock. The magma comes from the Earth’s core which is molten ... There are 5 kinds of igneous rocks, depending on the mix of minerals in the rocks. ... To learn more about igneous rocks and how rocks are formed, take a look at this Volcano WebQuest...
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www.rocksforkids.com/RFK/howrocks.html
www.rocksforkids.com/RFK/howrocks.html
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