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What happens to the rock as 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. This rock (basalt) becomes a new part of Earth’s crust.

How do rocks near a ridge compare in age to rocks farther away from a ridge?

It spreads apart along both sides of a mid-ocean ridge as new crust is added. How did scientists discover that rocks farther away from the mid-ocean ridge were older that those near the ridge? Oceanic crust near the mid-ocean ridge is younger than the crust farther from the ridge.

How do rocks along the central valley of the mid-ocean ridge?

How do rocks along the central valley of the mid-ocean ridge provide evidence of sea-floor spreading? They provide evidence of seafloor spreading because the oldest rocks are the farthest away and the newer ones are the closest so they are the new floor pushing away the old rocks.

What can we expect to find at a mid-ocean ridge?

Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth’s tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.

How does the age of the rock change as you move away from a mid-ocean ridge?

Scientists can determine the age of the seafloor by examining the changing magnetic field of our planet. While it cools down, it records the magnetic field during its formation. The two parts of the oceanic plate are pulled apart, and magnetic stripes become older as they move away from the mid-ocean ridge.

What is the role of the mid-ocean ridge in the movement of lithosphere plates?

The mid-ocean ridge represents an area where, in accordance with plate tectonic theory, lithospheric plates (also called tectonic plates) move apart and new crust is created by magma (molten rock) pushing up from the mantle . …

Where does the oldest farthest from the mid ocean ridge part of the Brown tectonic plate go?

The oldest parts of the oceanic crust are found farest from the mid ocean ridges at subduction zones and continental shelves.