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Chapter3B - T&L-3-1 Rocks Chapter 3 Rocks Rock A solid...

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T&L-3-1 Rocks Chapter 3 Rocks Rock — A solid piece of mineral substance, usually a mixture. Mineral Example — Granite is composed of the minerals quarty, mica, hornblend and orthoclase (a feldspar). Light Color = Light Weight Dark Color = Heavy Weight
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T&L-3-2 Rocks Rock Types Based on History Igneous Rock — Results from the crystallization of magma (granite, basalt). magma — molten rock. Sedimentary Rock — Forms from the lithification of sediment (sandstone, limestone). Sediment — Fragments of rock, plant or animal material, dissolved chemicals. Lithification — Hardening by compaction or cementation. Metamorphic Rock — Forms by the metamorphosis of other rocks. Metamorphism — A gradual change due to heat, pressure or the penetration of active fluids taking place far below the surface. Weathering — The breakdown of rock due to effects taking place near to the surface.
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T&L-3-3 Rocks The Rock Cycle S e di m en t S ed i m en t a r y R o c k I g n e ou s R o c k M e t a m or p h i c R o c k S e di m e nt ar y R o c k Uplift Weathering Deposition and Lithification Cementation and Compaction Deposition and Lithification Cementation and Compaction Deep Burial Melting and Crystallization Deep Burial Metamorphism Metamorphism Melting and Crystallization More
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T&L-3-4 Rocks Properties of Rocks Texture: Size and/or arrangement of grains or crystals in a rock, existence of gas bubbles. Texture is a sign of the conditions at crystallization. Pictures Coarse-grained — Grains large enough to be obvious (granite). Fine-grained — Smaller grains (not visible to naked eye) (volcanic rock). Glassy — (Amorphous) Grains not visible with a microscope.
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