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Geology_Plate_Tectonics_web - Earth Materials the...

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1 1 Earth Materials & the Lithosphere This week… The Earth’s Structure Igneous, Sedimentary & Metamorphic Rocks The creation of initial landforms: Plate Tectonics Tectonic Activity Volcanic Activity 2 Earth’s Structure 3 Lithosphere & Asthenosphere Lithosphere - solid, brittle outer portion of earth; contains crust and uppermost mantle Asthenosphere - soft layer sandwiched between lithosphere above and strong mantle rock layer beneath 4 Rock Cycle Cycle of Rock Change - processes that form rocks constitute a single system that cycles and recycles earth materials
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2 5 Rocks & Minerals Mineral - naturally occurring, inorganic solid with a definite chemical composition and a regular internal crystalline structure Rock - a solid, natural, cohesive aggregate of one or more minerals, mineraloid, glass, organic particles or rock fragments Rocks identified based on composition and texture 3 Categories of Rock: igneous, sedimentary, metamorphic 6 Igneous Rock Rocks that formed from the cooling and crystallization of magma (liquid rock or molten rock) consists of silicate minerals (Si & O atoms, and one or more metallic elements) 7 8 Classification of Igneous Rocks 1) Plutonic (Intrusive) Igneous rocks 2) Volcanic (Extrusive) Igneous rocks Plutonic Igneous Rocks
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