felsic rocks: texture intrusive extrusive muy extrusive graniterhyoliteobsidian
Post on 21-Dec-2015
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FELSIC ROCKS: texture
IntrusiveExtrusive
Muyextrusive
Granite Rhyolite Obsidian
Yosemite Valley: El CapitanYosemite Valley: El Capitan
Intrusive: slow cooling, large texture
ARROWHEADSARROWHEADS
Extrusive: fast cooling, fine texture
Igneous Rock TypesIgneous Rock Types
Figure 11.7
SLATESLATE
Because slate easily flakes, it’s ideal forFloors, roofs, blackboards.
GNEISSGNEISS
Gneiss is characterized by a banded or foliated pattern.Granite is a precursor rock to gneiss
Stress and StrainStress and Strain
FoldingFolding
Figure 12.8
Normal fault
Footwall moves Up relative toHanging wall
Tension forces
FOOTWALL
HANGING WALL
NORMAL FAULTNORMAL FAULT
Reverse FaultReverse Fault
Strike-slip FaultStrike-slip Fault
San Andreas FaultSan Andreas Fault
Figure 12.12