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Fault (geology) Satellite image of a fault in the Taklamakan Desert. The two colorful ridges (at bottom left and top right) used to form a single continuous line, but have been split apart by movement along the fault. In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant ...
These folds were produced by Alpine deformation. In structural geology, a fold is a stack of originally planar surfaces, such as sedimentary strata, that are bent or curved ("folded") during permanent deformation. Folds in rocks vary in size from microscopic crinkles to mountain-sized folds. They occur as single isolated folds or in periodic ...
In geology, 3D fold evolution is the study of the full three dimensional structure of a fold as it changes in time. A fold is a common three-dimensional geological structure that is associated with strain deformation under stress. Fold evolution in three dimensions can be broadly divided into two stages, namely fold growth and fold linkage.
The Yakima Fold Belt of south-central Washington, also called the Yakima fold-and-thrust belt, is an area of topographical folds (or wrinkles) raised by tectonic compression. It is a 14,000 km 2 (5,400 sq mi) structural-tectonic sub province of the western Columbia Plateau Province [ 1 ] [ 2 ] [ 3 ] resulting from complex and poorly understood ...
From south to north the Himalaya (Himalaya orogen) is divided into 4 parallel tectonostratigraphic zones and 5 thrust faults which extend across the length of Himalaya orogen. Each zone, flanked by the thrust faults on its north and south, has stratigraphy (type of rocks and their layering) different from the adjacent zones.
Compression (geology) In geology, the term compression refers to a set of stresses directed toward the center of a rock mass. Compressive strength refers to the maximum amount of compressive stress that can be applied to a material before failure occurs. When the maximum compressive stress is in a horizontal orientation, thrust faulting can ...
Vergence (geology) In structural geology, vergence refers to the direction of the overturned component of an asymmetric fold. [1] In simpler terms, vergence can be described as the horizontal direction in which the upper-component of rotation is directed. [2] Vergence can be observed and recorded in folds to help a geologist determine ...
A thrust fault is a type of reverse fault that has a dip of 45 degrees or less. [1][2] If the angle of the fault plane is lower (often less than 15 degrees from the horizontal [3]) and the displacement of the overlying block is large (often in the kilometer range) the fault is called an overthrust or overthrust fault. [4]