igneous rocks

Jun 30th, 2015
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1. How are igneous rocks formed? a. Formation of Igneous rocks i. Igneous rock is formed through the cooling and solidification of magma or lava. Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.

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1. How are igneous rocks formed?a. Formation of Igneous rocksi. Igneous rock is formed through the cooling andsolidificationofmagmaorlava. Igneous rock may form with or withoutcrystallization, either below the surface asintrusive(plutonic) rocks or on the surface asextrusive(volcanic) rocks.b. Magma-i. Melt-1. Liquid components of magma2. Composed mainly of mobile ions of the eight most common elements found in Earths Crust.ii. Volatiles-1. Gaseous components of magma2. H2o(g), CO2(g) and SO2 are most common3. Under immense pressure from overlaying rocksc. Crystalline Rock-i. is the (natural or artificial) process of formation of solidcrystalsprecipitatingfrom asolution,meltor more rarelydepositeddirectly from a gas.2. Igneous Processa. Intrusion igneous rocks (Plutonic rocks)i. is liquid rock that forms under Earth's surface.Magmafrom under the surface is slowly pushed up from deep within the earth into any cracks or spaces it can find, sometimes pushing existingcountry rockout of the way, a process that can take millions of yearsii. Coarse-grainediii. consist of visible mineral crystalsb. Extrusive Igneous ro

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