Folds and Faults. Tectonic Plates Types of Differential Stress 123.
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Transcript of Folds and Faults. Tectonic Plates Types of Differential Stress 123.
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
• Example: Glass objects, broken bones
Deforming MarbleShallow
Crust BrittleDeeper Crust
Ductile
M.S. Patterson, Australian National University
AnticlinAnticlinee
Syncline
Sinclair Dome, near Rawlings, WY
Folds
Types of Differential Stress
FaultsKanab, Utah
Fault
FaultA 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
Normal Fault
Rift Valley
Reverse Fault
Jurassic Sandstone
Devonian Limestone
Thrust
Fault
Thrust Fault
San Andreas Fault
Carrizo Plain, CA