What is tensional tectonic force?
Tensional stress occurs when a rock is subjected to forces that tend to elongate it or pull it apart; a rock that has experienced tensional stress tends to be narrower and longer than its original shape, like a piece of gum or taffy that has been pulled.
What is produced when tensional stresses result in the subsidence of a block of rock?
A graben fault is produced when tensional stresses result in the subsidence of a block of rock. On a large scale these features are known as Rift Valleys (Figure 10l-11).
What type of tectonic forces cause faulting?
(a) Fig. 10.6a: Compressive forces generate folding and faulting as a consequence of shortening. Compressive forces are common along convergent plate boundaries resulting in mountain ranges.
What does tension stress happen on rocks?
Tension stress pulls rocks apart. Tension causes rocks to lengthen or break apart. Tension is the major type of stress found at divergent plate boundaries. Shear stress happens when forces slide past each other in opposite directions (Figure below).
What are gradational forces?
Gradational forces are those exogenetic forces on the surface of the earth which are responsible for the denudation in a gradational manner or in a which include the process of weathering and erosion.
Which fault is related and applicable to tensional force?
Fault: Oblique This left-lateral oblique-slip fault suggests both normal faulting and strike-slip faulting. It is caused by a combination of shearing and tensional forces.
What type of stress causes anticlines and synclines?
Anticlines and synclines most commonly form in sections of the crust that are undergoing compression, places where the crust is being pushed together. Crustal compression is commonly the response to stress from more than one direction, which causes tilting as well as folding.
What changes do rocks undergo during formation of an orogenic belt such as the Alps?
What changes do rocks undergo during formation of an orogenic belt such as the Alps? In orogenic belts, rocks undergo deformation as a response to stress. Deformation can include faulting, jointing, folding, and the development of metamorphic foliation. Contrast brittle and ductile deformation.
What type of fault formed the Rocky Mountains?
Recognition of a major Precambrian continental-scale, two-stage conjugate strike-slip fault system—here designated as the Trans–Rocky Mountain fault system—provides new insights into the architecture of the North American continent.
Which stress results anticlines and synclines?
compression
Anticlines and synclines most commonly form in sections of the crust that are undergoing compression, places where the crust is being pushed together. Crustal compression is commonly the response to stress from more than one direction, which causes tilting as well as folding.
Which of the following forces will happen when rocks are pulled away from each other?
Tension is a directed (non-uniform) stress that pulls rock apart in opposite directions. The tensional (also called extensional) forces pull away from each other. Compression is a directed (non-uniform) stress that pushes rocks together.