rocks igneous
DESCRIPTION
GeologyTRANSCRIPT
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L5 - ROCKSIGNEOUS
CIVE 430 ENGINEERING GEOLOGY
SUMMER 2013
How and Where?
SolidificationTransport
Eruption Ponding
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How and Where?
How and Where?
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IGNEOUS ROCKS
IGNEOUS ROCKS
Intrusive
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IGNEOUS ROCKSCOMPOSITION
IGNEOUS ROCKSI. PLUTONIC = Cooling below the surface;
Slow -> Large CrystalsII. VOLCANIC= Cooling above the surface;
Rapid-> Small Crystals
~50% as high as 72%
LOW HIGH
DARK/MAFIC COLOR LIGHT/FELSIC
PLUTONIC GABBRO DIORITE GRANITEVOLCANIC BASALT ANDESITE RHYOLITE
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IGNEOUS ROCKS Crystal SizeBASALT GABBRO
RHYOLITE
GRANITE
Granite-Basalt : TEXTURE
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IGNEOUS ROCKS EXTRUSIVE
OBSIDIAN
VOLCANIC ASH
PUMICE
IGNEOUS ROCKS EXTRUSIVE
PUMICE
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IGNEOUS ROCKS EXTRUSIVE
PUMICE
IGNEOUS ROCKS EXTRUSIVE
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IGNEOUS ROCKSINTRUSIVE
PUMICE
COARSE GRANITE
GABBRO
IGNEOUS ROCKSINTRUSIVE
SANDSTONE