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06-13-12.md

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+Deformation and Mountain Building
+=================================
+
+1. Mountain belts
+
+Mt. Everest - Himalayas
+
+### Orogeny
+ * a mountain building-event
+ * tens of millions of years
+ * Erosion will eventually bevel the mountains down to sea level. Will
+ take at least as long as creating them.
+
+
+2. Deformation
+ * Types - ductile and brittle
+ * Causes - force and stress
+ * More types - faults and joints
+
+Undeformed beds = Badlands, SD
+
+Whats happening on the chemical level?
+* Brittle deformation - chemical bonds snap
+* Ductile deformation - chemical bonds stretch and bend. Form new minearls.
+
+Temperature, pressure, deformation rate, and rock composition affect
+deformation.
+
+Pressure - all around like being underwater
+Compression - pushing from two perpendicular directions
+Tension -
+Shearing -
+
+### Joints vs. faults
+Joints = natural cracks that form in brittle rocks in response to
+tensional stress; no movement along a joint
+Faults - fractures in a way...
+
+
+#### Faults
+Strike-Skip - Right Lateral > Horizontal (map view)
+Normal - Head block falls down ( with gravity sort a) Tensional - Basin
+and Range mountain building, not as tall.
+Reverse - Head block moves up ( Compressionial - Mtn Building ) Also
+called thrust fault.
+
+#### Folds
+Anticline-Axial Plane, hinge line \cap
+Syncline- Axial plane, Hinge line \cup
+Monocline- Two hingles ===
+ |
+ =====
+
+Open fold
+Tight
+Plunging
+Non-Plunging
+
+Dome
+Basins

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