- What happens to old seafloor during the process of its destruction?
- What are the three types of seafloor spreading?
- What happens when two oceanic plates collide?
- What are the 4 types of tectonic plate movement?
- What does seafloor spreading look like?
- What causes seafloor spreading?
- At which boundaries is seafloor destroyed?
- Is seafloor destroyed?
- What are the 4 types of plate boundaries?
- What are the 2 types of crust?
- Where is sea floor destroyed?
What happens to old seafloor during the process of its destruction?
The process by which ocean floor sinks beneath a deep-ocean trench and back into the mantle is called subduction (sub duk shun).
As subduction occurs, crust closer to a mid-ocean ridge moves away from the ridge and toward a deep-ocean trench.
Sea-floor spreading and subduction work together..
What are the three types of seafloor spreading?
There are three types of plate-plate interactions based upon relative motion: convergent, where plates collide, divergent, where plates separate, and transform motion, where plates simply slide past each other.
What happens when two oceanic plates collide?
When two oceanic plates converge, the denser plate will end up sinking below the less dense plate, leading to the formation of an oceanic subduction zone. … Whenever a subduction zone is formed, the subducted plate will end up being partially melted by the earth’s internal magma and molten.
What are the 4 types of tectonic plate movement?
There are four types of boundaries between tectonic plates that are defined by the movement of the plates: divergent and convergent boundaries, transform fault boundaries, and plate boundary zones.
What does seafloor spreading look like?
Seafloor spreading is a geologic process in which tectonic plates—large slabs of Earth’s lithosphere—split apart from each other. Seafloor spreading and other tectonic activity processes are the result of mantle convection. … The less-dense material rises, often forming a mountain or elevated area of the seafloor.
What causes seafloor spreading?
Seafloor spreading helps explain continental drift in the theory of plate tectonics. When oceanic plates diverge, tensional stress causes fractures to occur in the lithosphere. … At a spreading center, basaltic magma rises up the fractures and cools on the ocean floor to form new seabed.
At which boundaries is seafloor destroyed?
The seafloor is destroyed at a COnvergent Boundary.
Is seafloor destroyed?
You are correct that the seafloor is destroyed at subduction zones, but it is simultaneously being created at mid-ocean ridges. see figure 1 . Figure 1: Seafloor spreading at a mid-ocean ridge(where new crust is being created) and it’s destruction at a subduction zone. see figure 2 .
What are the 4 types of plate boundaries?
Plate Boundaries and Hotspot DemonstrationDivergent Plate Boundary. Volcanic eruptions and shallow earthquakes are common where plates rip apart.Convergent Plate Boundary. … Transform Plate Boundary. … Hotspot.
What are the 2 types of crust?
Earth’s crust is divided into two types: oceanic crust and continental crust. The transition zone between these two types of crust is sometimes called the Conrad discontinuity. Silicates (mostly compounds made of silicon and oxygen) are the most abundant rocks and minerals in both oceanic and continental crust.
Where is sea floor destroyed?
The oldest known ocean floor is dated at about 200 million years, indicating that older ocean floor has been destroyed through subduction at deep-sea trenches.