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Which trench would contain the oldest rock?
The Mariana Trench is generally considered to contain the oldest oceanic rocks due to the process of subduction. As tectonic plates converge, older seafloor is pushed down into the trench, while younger rocks are formed at mid-ocean ridges. Therefore, the sediments and rocks found at the bottom of the Mariana Trench can be some of the oldest in the oceanic crust, dating back millions of years.
In which layer does erosion take place?
Erosion primarily occurs in the Earth's crust, specifically in the geosphere layer. This is where physical processes like wind, water, and glaciers gradually wear down and transport rock and soil from one place to another.
What type of mountains are formed when tension causes large blocks of Earth's crust to drop down relative to other blocks?
Large blocks of Earth's crust that drops down relative to other blocks, will form a rift valley (trench). The Great Rift Valley in Africa is one example.
Does a trench or a ridge curves down the middle of the Atlantic ocean basin?
Yes, a large trench known as the Mid-Atlantic Ridge runs down the middle of the Atlantic Ocean basin. This underwater mountain range is where tectonic plates are moving apart, causing new oceanic crust to form in the process.
What is the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary called?
The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary is called subduction. This occurs because oceanic crust is denser than the underlying asthenosphere, causing it to be pulled down into the mantle. Subduction zones are associated with the formation of volcanic arcs and deep-sea trenches.
Where is old crust pushed down into a trench?
subdution zone
SUbduction occurs where the oceanic crust bends down toward the mantle at a(an)?
deep ocean trench.
What happens to this crust as it is pushed down into the mantle?
As it is cold and wet, it continues to sink and slowly heats up. This causes partial melting and it acts as a source of magma for volcanoes that form above it. so does other people burn when the go into mantle?
Do folded mountains form by plates being pushed down?
Folded mountains form when tectonic plates collide and the crust is compressed and folded due to the immense pressure. The plates are not pushed down, but rather collide, causing the crust to buckle and fold upward to form mountains.
What happens at an oceanic- oceanic subduction?
The plate with cooler, denser crust sinks under the other plate, forming a trench. There, the oceanic crust sinks down back into the mantle.
What happens at oceanic-oceanic subduction?
The plate with cooler, denser crust sinks under the other plate, forming a trench. There, the oceanic crust sinks down back into the mantle.
What forms when huge parallel crack or fault appear in the Earth's crust and the strip of crust between them sink or are pushed down to from great steep-sided linear valley?
rift valleys
What are large areas of earths crust that are pushed up called?
Pushed up : mountain Pushed down: crater/land stop
In which layer does erosion take place?
Erosion primarily occurs in the Earth's crust, specifically in the geosphere layer. This is where physical processes like wind, water, and glaciers gradually wear down and transport rock and soil from one place to another.
Subduction occurs where the oceanic crust bends down towards the mantle at a?
Subduction occurs where the oceanic crust bends down towards the mantle at a subduction zone, typically at convergent plate boundaries where two tectonic plates collide. The denser oceanic plate is forced beneath the less dense continental plate, creating a deep trench and volcanic activity. This process contributes to the recycling of Earth's crust and the formation of mountain ranges and volcanic arcs.
What happens when an oceanic plate collides with a continental plate?
when oceanic crust and continental crust collide, the oceanic crust sinks down beneath the continental crust. this is called subduction.
What is the name of the place where the crust goes back down into the earth?
That would be Subduction.
