Which is the first step in the seafloor spreading process? A crack forms in
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What is the process of seafloor spreading for kids?
Seafloor spreading happens at the bottom of an ocean as tectonic plates move apart. … It forms new crust as the plates move away from each other. The new crust then slowly moves away from the ridge. It is a place of earthquakes and volcanos.
What is the process that produces volcanoes at convergent plate boundaries?
If two tectonic plates collide they form a convergent plate boundary. Usually one of the converging plates will move beneath the other a process known as subduction. … The new magma (molten rock) rises and may erupt violently to form volcanoes often building arcs of islands along the convergent boundary.
What does the seafloor spreading theory state?
This process called subduction occurs at the oceanic trenches (figure 6). The entire region is known as a subduction zone. Subduction zones have a lot of intense earthquakes and volcanic eruptions. The subducting plate causes melting in the mantle.
FAQ
What are the steps of seafloor spreading?
- Magma comes out of the rift valley.
- Magma cools to rock and hardens.
- Rock is pushed away as new rock is formed at MOR.
- Oceanic crust and continental crust meet at the trench.
- Oceanic crust bends down under the continental crust.
- Gravity pulls rock towards mantle.
- Rock melts to mantle.
What are the 3 types of seafloor spreading?
Which is 1 piece of evidence of seafloor spreading?
First, samples of the deep ocean floor show that basaltic oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached, and the sediment cover is thinner near the ridge.
What observation first led to seafloor spreading?
