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Folds and Faults. Tectonic Plates. Types of Differential Stress. 1. 2. 3. Ductile Deformation Rock will flow in response to stress Rock will change shape during flow Example: Copper penny on train tracks. Brittle Deformation Rock will break in response to stress
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Ductile Deformation • Rock will flow in response to stress • Rock will change shape during flow • Example: Copper penny on train tracks
Brittle Deformation • Rock will break in response to stress • Example: Glass objects, broken bones
Deforming Marble Shallow Crust Brittle Deeper Crust Ductile M.S. Patterson, Australian National University
Anticline Syncline
Faults Kanab, Utah
Fault A break in a rock along which movement has occurred.
Normal Fault:Rock above fault plane has moved down relative to rock below Reverse Fault:Rock above fault plane has moved up relative to rock below
Normal Reverse Strike-Slip
Thrust Fault Devonian Limestone Jurassic Sandstone
San Andreas Fault Carrizo Plain, CA