How does seafloor spreading help the theory of continental drift?
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. Older rocks will be found farther away from the spreading zone while younger rocks will be found nearer to the spreading zone.
What is the name of the landmass country through which the mid-ocean ridge in the Atlantic Ocean passes where is it located?
country of Iceland
What evidence supports Hess’s theory of seafloor spreading?
Sea floor continues to spread apart as new crust is added. Processes repeats like a conveyor belt, carrying continents along with them. Evidence supported Hess’s theory of sea-floor spreading: eruptions of molten material, magnetic stripes in the rock of the ocean floor, and the ages of the rocks themselves.
What are the evidence of seafloor spreading?
The study of the repeated reversal of the Earth’s magnetic poles over time has provided convincing evidence of seafloor spreading. Objective: To explore how magnetic studies and age information provide evidence for seafloor spreading that explains why oceanic crust is younger than continental crust.
What is the process of seafloor spreading?
Seafloor spreading is a geologic process in which tectonic plates—large slabs of Earth’s lithosphere—split apart from each other. The less-dense material rises, often forming a mountain or elevated area of the seafloor. Eventually, the crust cracks.
What boundaries can destroy seafloor?
Convergent margins This is accomplished at convergent plate boundaries, also known as destructive plate boundaries, where one plate descends at an angle—that is, is subducted—beneath the other.
How is seafloor destroyed?
Framework Integration: Themes: Patterns of change: over time, new sea-floor is created by the upwelling of magma at mid-ocean spreading centers; old ocean floor is destroyed by subduction at deep sea trenches. Life Science: animals found at hot-water vents on the ocean floor.
Where does the seafloor get destroyed?
subduction zones
What is the seafloor made of?
The seafloor contains deposits of minerals that we use in everyday life such as copper, zinc, nickel, gold, silver, and phosphorus. These deposits occur as crusts on volcanic and other rocks and as nodules on abyssal plain sediment that are typically about 3 to 10 centimeters (1 to 4 inches) in diameter.
What causes the formation of new seafloor?
Explanation: Seafloor spreading is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.At a spreading center, basaltic magma rises up the fractures and cools on the ocean floor to form new seabed.