folding happens when rock layers bend under stress
by rocky layers bend under stress
Faults are formed by brittle deformations and folds are formed by ductile deformation.
Folds which maintain uniform layer thickness are classed as concentric folds; those which do not are called similar folds. Similar folds tend to display thinning of the limbs and thickening of the hinge zone. Concentric folds are caused by warping which results from deformation of the layers, whereas similar folds usually form by some form of dislocation between the layers (sliding), with extension and contraction of the thickness of rock layers differently in the limb and hinge zones. -118 Team!
elastic deformation, ductile deformation and fracture
Elastic deformation is recoverable deformation. As such, when the load that caused the deformation is removed the material will return to it's original shape.
ductile deformation
Faults are formed by brittle deformations and folds are formed by ductile deformation.
"Folding" is the term that describes the bending of rock layers due to stress.There are different types of Folds and these include:Anticlinal Folds: This is when the rock layers have an upward-arching folds.Synclinal Folds: This is when the rock layers have a downward, trough-like folds.Monoclinal Folds: This is when both rock layers ends are horizontal.
Folds which maintain uniform layer thickness are classed as concentric folds; those which do not are called similar folds. Similar folds tend to display thinning of the limbs and thickening of the hinge zone. Concentric folds are caused by warping which results from deformation of the layers, whereas similar folds usually form by some form of dislocation between the layers (sliding), with extension and contraction of the thickness of rock layers differently in the limb and hinge zones. -118 Team!
deformation is related to metamorphic rock structures because deformation can create metamorphic rocks through the stress it creates, and also certain structures in the foliations of metamorphic rocks can indicate stress and stress direction from deformation. Some structures caused by stress are folds and faults, and the resulting indicators in metamorphic rocks include things such as sigma structures, Z structures, mica fish, boudinage structures and many others.
The newspaper article indicated that the earthquake happened in Japan.
elastic deformation
folds up
elastic deformation, ductile deformation and fracture
Elastic deformation is recoverable deformation. As such, when the load that caused the deformation is removed the material will return to it's original shape.
ductile deformation
it is deformation below recrystalization temperature.
Anelastic deformation. Deformation processes where a material assumes its original shape after the load is removed, but with a time delay.