Table of Contents
Where does seafloor spreading end?
Seafloor spreading creates new oceanic crust at a mid-ocean ridge. When this new material reaches the end of the plate and comes into contact with another plate, whether continental or not, a convergent or a transform boundary will occur.
Which of the following is formed when seafloor spreads?
The phenomenon is known today as plate tectonics. In locations where two plates move apart, at mid-ocean ridges, new seafloor is continually formed during seafloor spreading.
What boundary destroys the seafloor?
Seafloor spreading is when the sea floor spreads apart. This occurs at Divergent Boundaries. At which type of boundary is seafloor destroyed? The seafloor is destroyed at a COnvergent Boundary.
How does the movement of Earth’s tectonic plates result in many geologic features?
The movement of these tectonic plates is likely caused by convection currents in the molten rock in Earth’s mantle below the crust. Earthquakes and volcanoes are the short-term results of this tectonic movement. The long-term result of plate tectonics is the movement of entire continents over millions of years (Fig.
What happens when the seafloor spreads?
Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle’s convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor. Eventually, the crust cracks.
Which boundary is seafloor destroyed?
Which boundaries is seafloor destroyed?
How is the spreading of the seafloor explained?
The Theory of Seafloor Spreading Seafloor spreading is a geologic process where there is a gradual addition of new oceanic crust in the ocean floor through a volcanic activity while moving the older rocks away from the mid-oceanic ridge.
What happens when tectonic plates crash on the seafloor?
Subduction happens where tectonic plates crash into each other instead of spreading apart. At subduction zones, the edge of the denser plate subduct s, or slides, beneath the less-dense one. The denser lithospheric material then melts back into the Earth’s mantle. Seafloor spreading creates new crust.
How does the speed of sound affect the seafloor?
By knowing the speed of sound in seawater, scientists calculate the distance to the object based on the time it takes for the wave to make a round-trip. During the war, most of the sound waves ricocheted off the ocean bottom. This echo sounder has many beams and creates a three dimensional map of the seafloor.
How are magnetic stripes spread across the seafloor?
The magnetic stripes continue across the seafloor. As oceanic crust forms and spreads, moving away from the ridge crest, it pushes the continent away from the ridge axis. If the oceanic crust reaches a deep sea trench, it sinks into the trench and is lost into the mantle.