deforming the earths crust beth roland team 5 mountaineers eighth grade science
TRANSCRIPT
Deforming the Earth’s Crust
Beth Roland
Team 5 Mountaineers
Eighth Grade Science
Deformation
• Deformation is the process by which a rock changes shape
Deformation
Compression-Occurs when a rock Layer is squeezed-Converging platesCreate mtn ranges
Tension-Occurs when forces pull
or stretch rock layers-diverging plates create-mid-ocean ridges and
faults
Folds in the Geologic Column
• Folding is the bending of rock layers because of stress in the Earth’s crust.
Types of Folds
Anticline- upward Arching fold
Syncline- DownwardArching fold
Monocline- folded in Between 2 horizontal
ends
Faulting• Faulting is the breakage of rock caused when
stress is applied to them. The surface along which the layers slide past each other is called a fault.
• Normal Faults-when a normal fault moves the hanging wall moves downward relative to the footwall.
Faulting
• Reverse Faults- when a reverse fault moved the hanging wall moves up relative to the footwall.
San Andres Fault