FELSIC ROCKS: texture Intrusive Extrusive Muy extrusive GraniteRhyoliteObsidian.

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Presentation transcript:

FELSIC ROCKS: texture Intrusive Extrusive Muy extrusive GraniteRhyoliteObsidian

Yosemite Valley: El Capitan Intrusive: slow cooling, large texture

ARROWHEADS Extrusive: fast cooling, fine texture

Igneous Rock Types Figure 11.7

SLATE Because slate easily flakes, it’s ideal for Floors, roofs, blackboards.

GNEISS Gneiss is characterized by a banded or foliated pattern. Granite is a precursor rock to gneiss

Stress and Strain

Folding Figure 12.8

Normal fault Footwall moves Up relative to Hanging wall Tension forces FOOTWALL HANGING WALL

NORMAL FAULT

Reverse Fault

Strike-slip Fault

San Andreas Fault Figure 12.12