4_Igneous rocks - GEO 303 Lecture 4 Igneous Rocks Chapter 5...

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January 27 th and 31st , 2011 GEO 303, Lecture 4 Igneous Rocks Chapter 5 Next lecture : Ch 7 Sedimentary rocks In lab : Finish Ch 4, Texas Memorial Museum trip Next time, Ch 6, igneous rocks
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Igneous Rocks Making magma Cooling magma Texture Composition Differentiation Igneous rock classification Intrusive processes/landforms Extrusive processes/landforms
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Igneous rocks : form by crystallization from magma, siliceous melt 2 types: Intrusive (plutonic) : magma cools beneath Earth surface. Extrusive (volcanic) : lava cools on Earth’s surface. Common minerals : silicates (quartz, feldspar, mica, pyroxene, amphibole, olivine) Igneous Rocks: “Born of Fire” Igneous Rocks: “Born of Fire”
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Earth: “Born of Fire” Earth: “Born of Fire” … but mostly solidified after initial formation
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Making magma Making magma (aka melting crust) (aka melting crust) Where does the magma that feeds volcanoes and magma chambers come from? (A) isolated chambers of magma in the crust and mantle; (B) a universal pool of magma in the completely molten mantle; (C) the liquid core of the earth; (D) all of the above. Question
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Making magma (aka melting crust) (aka melting crust) Where does the magma that feeds volcanoes and magma chambers come from? (A) isolated chambers of magma in the crust and mantle; (A) a universal pool of magma in the completely molten mantle; (B) the liquid core of the earth; (C) all of the above. Question
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This note was uploaded on 03/20/2011 for the course GEO 303 taught by Professor Leon during the Spring '08 term at University of Texas.

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4_Igneous rocks - GEO 303 Lecture 4 Igneous Rocks Chapter 5...

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