The force acting on a surface, per unit area, which may be greater in certain directions than in others.
A particular kind of stress in which the forces acting on a body are the same in all directions.
A temporary change in shape or volume from which a material rebounds after the deforming stress is removed.
A permanent but gradual change in shape or volume of a material, caused by flowing or bending.
An elongated region of crust that has been deformed and metamorphosed through a continental collision.
The study of stress and strain, the processes that cause them, and the deformation and rock structures that result from them.
The compass orientation of the line of intersection between a horizontal plane and a planar feature, such as a rock layer or fault.
A fault in which the block of rock above the fault surface moves downward relative to the block below.
A fault in which the block on top of the fault surface moves up and over the block on the bottom.
A fault in which the direction of the movement is mostly horizontal and parallel to the strike of the fault.
A fold in the form of an arch, with the rock strata convex upward and the older rocks in the core.
A fold in the form of a trough, with the rock strata concave upward and the younger rocks in the core.
A map that shows the locations, kinds, and the orientation s of rock units, as well as structural features suck as faults and folds.