What is the simple definition of subduction?
: the action or process in plate tectonics of the edge of one crustal plate descending below the edge of another.
What is subduction in plate tectonics?
When tectonic plates converge, one plate slides beneath the other plate, or subducts, descending into the Earth’s mantle at rates of 2-8 centimeters (1–3 inches) per year. See Earthword – Subduction.
How do you describe a subduction zone?
A subduction zone is the biggest crash scene on Earth. These boundaries mark the collision between two of the planet’s tectonic plates. At a subduction zone, the oceanic crust usually sinks into the mantle beneath lighter continental crust.
What is a subduction rock?
A subduction zone is a region of the earth’s crust where one tectonic plate moves under another tectonic plate; oceanic crust gets recycled back into the mantle and continental crust gets created by the formation of arc magmas. This water lowers the melting point of mantle rock, initiating melting.
What are the three types of subduction?
There are three main types: Convergent boundaries, where plates move towards each other. Divergent boundaries, where plates move apart. Transform boundaries, where plates slide alongside each other.
What causes subduction?
Subduction occurs when two plates collide at a convergent boundary, and one plate is driven beneath the other, back into the Earth’s interior. When an oceanic plate collides with a continental plate, the denser oceanic plate is bent downward and slides under the edge of the continent.
What are the four major features of a subduction zone?
List the four major features of subduction zones….Terms in this set (30)
- Oceanic lithosphere goes under the oceanic plate.
- Scraped sediments accumulate on upper plates.
- Igneous and metamorphic rocks form mountainous topography.
What is another word for subduction?
What is another word for subduction?
| subtraction | deduction |
|---|---|
| taking away | lessening |
| markdown | rollback |
| knock-off | abstraction |
| discounting | docking |
What are the 2 types of subduction zones?
There are 2 main types of subduction zones: Oceanic-oceanic plate boundaries: If the subducting plate subducts beneath an adjacent oceanic plate, an island arc is formed.
Does subduction cause volcanoes?
Stratovolcanoes tend to form at subduction zones, or convergent plate margins, where an oceanic plate slides beneath a continental plate and contributes to the rise of magma to the surface. Volcanoes are not generally found at strike-slip zones, where two plates slide laterally past each other. …
What occurs at a subduction zone?
Subduction zones are plate tectonic boundaries where two plates converge, and one plate is thrust beneath the other. This process results in geohazards, such as earthquakes and volcanoes. Earthquakes are caused by movement over an area of the plate interface called the seismogenic zone.
Which is the best dictionary definition of subduction?
See more synonyms for subduction on Thesaurus.com. noun. an act or instance of subducting; subtraction or withdrawal. Geology. the process by which collision of the earth’s crustal plates results in one plate’s being drawn down or overridden by another, localized along the juncture (subduction zone) of two plates.
How does subduction occur at convergent plate boundaries?
Subduction is a kind of geological recycling that occurs at convergent plate boundaries, where two tectonic plates come together due to the motion of the fluid mantle layer of the earth. Subduction zones involve either one oceanic plate sinking under another or a dense oceanic plate sinking under a lighter continental plate.
How are earthquakes related to the subduction zone?
A geologic process in which one edge of one lithospheric plate is forced below the edge of another. The denser of the two plates sinks beneath the other. As it descends, the plate often generates seismic and volcanic activity (from melting and upward migration of magma) in the overriding plate. obduction.
How does a subduct affect a geologic process?
A geologic process in which one edge of one lithospheric plate is forced below the edge of another. The denser of the two plates sinks beneath the other. As it descends, the plate often generates seismic and volcanic activity (from melting and upward migration of magma) in the overriding plate.
