Earth_materials_2

Earth_materials_2 - Rock types are distinguished by their...

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Unformatted text preview: Rock types are distinguished by their origin osemite Valley, CA Igneous Sedimentary Metamorphic 1. Igneous rocks formed by solidification (cooling) of magma intrusive igneous rocks extrusive igneous rocks Lava flows in Hawaii This lava solidifies to form basalt Properties of rocks important for environmental geology: Strength Texture the arrangement and size of mineral grains Porosity amount of open pore space Permeability ability of fluid to move through material Structure Textures in igneous rocks Interlocking texture common in many igneous rocks; also occurs in some metamorphic rocks and some sedimentary rocks. Note that there is almost no open pore space with this texture. Interlocking texture in igneous rock Coarse grain size in intrusive igneous rocks Granite counter-top Volcanic rocks have fine grain size because of rapid solidification Some volcanic rocks have vesicular texture (this reduces strength) Extremely rapid cooling results in glass Obsidian 2. Sedimentary rocks2....
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This note was uploaded on 05/13/2011 for the course GEO 101 taught by Professor Hanson during the Spring '08 term at SUNY Stony Brook.

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Earth_materials_2 - Rock types are distinguished by their...

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