Quick Answer: Does The Age Of The Rock Increase Or Decrease As You Move Away From The Mid Ocean Ridge?

Why do ocean water depths increase away from the mid ocean ridges?

Since hot rocks are in a more expanded state and then contract as they cool (as they spread away from the ridge), the midocean ridges stand up high above the surrounding seafloor.

The seafloor depth increases with distance away from the midocean ridges.

The midocean ridges lie about 2.5 km below sea level..

What will happen if the mid ocean ridge creates more crust that can be swallowed by deep ocean trenches?

If the mid-ocean ridge creates more crust than can be swallowed by deep ocean trenches, the ocean sea floor becomes larger and wider. And the seafloor will keep on getting smaller if the swallowing of the deep ocean trenches is faster than creating new sea floor.

Which two tectonic plates are separated by a mid ocean ridge?

Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor. The Mid-Atlantic Ridge, for instance, separates the North American plate from the Eurasian plate, and the South American plate from the African plate.

What is an example of a mid ocean ridge?

Mid-ocean ridges form where two tectonic plates are pulling apart, also called seafloor spreading. … The Mid-Atlantic Ridge, which is spreading one to two inches a year, along with the East Pacific Rise, which is spreading two to six inches a year, are two examples of very long mid-ocean ridges.

What are 4 types of ocean floor?

Lesson SummaryStudying the ocean floor is difficult because the environment is so hostile. … Features of the ocean floor include the continental shelf and slope, abyssal plain, trenches, seamounts, and the mid-ocean ridge.The ocean floor is rich in resources.

What can you infer about continents on opposite sides of the same mid ocean ridge?

10. What can you infer about continents on opposite sides of the same mid-ocean ridge? The opposite sides of the same mid-ocean ridges all are the deepest points.

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

The lithospheric plates move relative to each other. They are created at mid-oceanic ridges and destroyed at subduction zones. … A mid-ocean ridge demarcates the boundary between two tectonic plates, and consequently is termed a divergent plate boundary.

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

As rocks crystallise from lava at the ridges, they literally record the magnetic field of the Earth at the time of their creation. … 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 happens to the age of seafloor rocks moving away from a mid ocean ridge quizlet?

In a process taking tens of millions of years, part of the ocean floor sinks back into the mantle at deep-ocean trenches. A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle. … As it moves away from the mid-ocean ridge toward a deep ocean trench it cools and becomes more dense.

What are the most prominent features on the ocean floor?

The most prominent features of ocean basins are the mid-ocean ridges, which form underwater mountain ranges that run along the floors of all oceans. Mid-ocean ridges rise above sea level in only a few places, such as in Iceland.

How does the age of rock in the middle of the mid ocean ridge compare to the rock further away from the center?

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.

Which evidence best supports the theory of seafloor spreading?

Several types of 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. This evidence led scientists to look again at Wegener’s hypothesis of continental drift.

Where is the mid ocean ridge located?

The Mid-Atlantic Ridge extends from south of Iceland to the extreme South Atlantic Ocean near 60° S latitude. It bisects the Atlantic Ocean basin, which led to the earlier designation of mid-ocean ridge for features of this type.

What do you expect to find in the 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.

What happens as newly formed oceanic crust moves away from the mid ocean ridge?

New oceanic crust is hot. But as it moves away from the mid-ocean ridge, it cools and becomes more dense. Eventually, as shown in Figure 19, gravity pulls this older, denser oceanic crust down beneath the trench. The sinking crust is like the washcloth in the Discover activity at the beginning of this section.

Why do plates move away from the mid ocean ridges?

As the two move apart, mid-ocean ridges are created as magma from the mantle upwells through a crack in the oceanic crust and cools. … These continual convection currents, called convection cells, help to move the plates away from each other to allow more crust to be created and the sea floor to grow.

What happens as newly formed oceanic crust moves away from the mid ocean ridge quizlet?

The older oceanic crust moves away from the mid-ocean ridge. … When lava erupts along a mid – ocean ridge ; it cools, and crystallizes. This permanently records the direction and orientation of Earth’s magnetic field at the time of the eruption. Explain how rocks on the seafloor records magnetic reversals over time.

Which mid ocean ridge is spreading the slowest?

The Ridge is named after him, and the name was recognized in April 1987 by SCUFN (under that body’s old name, the Sub-Committee on Geographical Names and Nomenclature of Ocean Bottom Features). The ridge is the slowest known spreading ridge on earth, with a rate of less than one centimeter per year.

What’s the definition of mid ocean ridge?

A mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.

What might happen if the magma under a mid ocean ridge cools?

According to Hess’s theory, what might happen if the magma under a mid-ocean ridge cools? The magnetic stripes might reverse direction. The deep-ocean trench might become deeper. The crust at the ridge might form more quickly.

Why are the rocks at the Mid Ocean Ridge younger than rocks farther away?

The scientists found that the farther the rocks the older the rocks were,so the youngest rocks were found near the mid-ocean ridge. This showed that sea-floor spreading took place because that fact that rocks were because pushed out showed us that the sea-floor was spreading.