Geology - Geology Mineralology -use color as an indicator...

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Geology  29/08/2007 14:03:00 Mineralology -use color as an indicator light colored rich in feldspar and quartz(iron and magnesium poor minerals) dark colored rich in pyroxene, olivine and feldspar (iron and magnesium rich minerals) Texture Intrusive-cooled quickly, small crystals Extrusive-cooled quickly, large crystals As a first approximation felsic explosive volcanism mafic-quiet volcanism Compositon of Igneous Rocks • Those rich in quartz are classified as FELSIC @ are lightly colored • Those rich in iron and magnesium-bearing minerals are darker colored or  MAFIC *sedimentary rocks the formation of sed. Rocks involves three steps : -weathering of pre-existing rocks to form sediments lithification of the sediments *types of sedimentary rocks :
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-clastic/detrital -chemical *Sediments -methods of transport water-streams, rivers, glaciers, ocean currents landslides-mass wasting wind-aeolian deposits *Sediments rounding-from angular to rounded particles sorting-from a mixture of sizes to a uniform size CLASTIC SEDIMENTARY ROCKS any transported and deposited material (rocks,minerals,organic matter,fossils) -congolmate-rounded and course-grained rock or mineral fragments -snadstone-rounded and sand size particles -shale-fine grained particles chemical sedimentary rocks limestone-mostly calcite (CaCO3) Ca2+CO3^2=CaCO3
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This note was uploaded on 05/06/2008 for the course GEO 1400 taught by Professor Peternabelek during the Winter '08 term at Missouri (Mizzou).

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Geology - Geology Mineralology -use color as an indicator...

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