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Unformatted text preview: Rocks- Rocks are aggregates of minerals (and sometimes aggregates of rocks)- Two major rock textures o Crystalline and clastic (fragmental, detrital) Three Major Rock types- Igneous : derived from molten rock (magma, lava); both crystalline and clastic- Sedimentary : clastic and crystalline rock types most commonly deposited in or by water; some clastic types deposited by wind or by settling out of particles in the atmosphere- Metamorphic: crystalline rocks formed by the recrystallization of pre-existing rocks under conditions of elevated temperature and pressure with or without changes in chemistry Igneous Rocks- Kilauea lava flow in foreground; lava fountains in background- Type of Rock and source material: Melting of rocks in hot, deep crust and upper mantle - Rock forming process: Crystallization (solidification of magma or lava)- Igneous Rocks are the products of cooling (usually with crystallization) of molten rock called “magma” when it is below the earth’s surface, and “lava” when at the...
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This note was uploaded on 10/05/2008 for the course GEOL 105Lg taught by Professor Davis,platt during the Fall '07 term at USC.
- Fall '07