What is an extensional plate boundary?
Three main types of plate boundaries: Divergent: extensional; the plates move apart. Spreading ridges, basin-range. Convergent: compressional; plates move toward each other.
What is extensional setting?
Extensional Tectonics: A tectonic process associated with the stretching and thinning of the crust or lithosphere. Other definitions:Wikipedia Reegle.
Where does extensional deformation occur?
Continental Rifting
Continental Rifting occurs where continental crust is undergoing extensional deformation. This results in thinning of the lithosphere and upwelling of the asthenosphere which results in uplift.
How are extensional basins formed?
When a strike-slip fault is offset along strike such as to create a gap e.g. a left-stepping bend on a sinistral fault, a zone of extension or transtension is generated. Such bends are known as releasing bends or extensional stepovers and often form pull-apart basins or rhombochasms.
What are extensional forces?
An extensional fault is a fault caused by stretching of the Earth’s crust. Stretching reduces the thickness and horizontally extends portions of the crust and/or lithosphere. In most cases such a fault is also a normal fault, but may create a shallower dip usually associated with a thrust fault.
What extensional means?
1 : of, relating to, or marked by extension specifically : denotative. 2 : concerned with objective reality. Other Words from extensional Example Sentences Learn More About extensional.
What extensional tectonic process will form mountains?
When plates collide or undergo subduction (that is – ride one over another), the plates tend to buckle and fold, forming mountains. Most of the major continental mountain ranges are associated with thrusting and folding or orogenesis.
What faults occur in extensional settings?
What is an example of an extensional definition?
An extensional definition is one that identifies the members of the class it names by indicating instances of the thing being defined. It’s giving definitions by example. Let’s consider some examples: “That” (pointing to the cup on my desk) “is a cup.” In this example I name an instance of a larger set–“cups”.
What do you mean by extensional and intentional meaning of a term?
intension and extension, in logic, correlative words that indicate the reference of a term or concept: “intension” indicates the internal content of a term or concept that constitutes its formal definition; and “extension” indicates its range of applicability by naming the particular objects that it denotes.