What Is The Meaning Of Mid Ocean Ridge?

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 kind of faulting is characteristic of mid ocean ridges?

The spreading center or axis, commonly connects to a transform fault oriented at right angles to the axis. The flanks of mid-ocean ridges are in many places marked by the inactive scars of transform faults called fracture zones.

What is the biggest mid ocean ridge?

The mid-ocean ridge is the longest mountain range on Earth. The longest mountain range on Earth is called the mid-ocean ridge. Spanning 40,389 miles around the globe, it’s truly a global landmark. About 90 percent of the mid-ocean ridge system is under the ocean.

What types of volcanoes form at mid ocean ridges?

Tectonic SettingTypical ype(s) of volcanoesDivergent plate boundarymid-ocean ridge; fissures and vents; shield volcanoesIntracontinental exensionvaried: fissures and vents, flood eruptions, cinder cones, stratovolcanoes, caldera complexesConvergent plate boundarystratovolcanoesHot spots2 more rows

What rocks form at mid ocean ridges?

Igneous rock is formed by the cooling and crystallization of molten magma at volcanoes and mid-ocean ridges, where new crust is generated. Examples of igneous rock are basalt, granite, and andesite (Fig.

Why are rocks next to the Mid Ocean Ridge younger than those farther away from the ridges?

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. … The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle.

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.

How old is the Mid Atlantic Ridge?

Fission-track dating of basaltic glass from the Mid-Atlantic Ridge gives results which are consistent with the proposal of ocean-floor spreading. Solidification ages from ~10,000 years to ~300,000 years were measured.

What does Trench mean?

A trench is a deep and narrow hole, or ditch, in the ground, like the kind soldiers on frontlines might dig to give themselves shelter from the enemy. … The verb trench means to dig or to cut into, but you will most often hear the word as a noun, particularly relating to soldiers.

What does ocean ridge mean?

noun. any section of the narrow, largely continuous range of submarine mountains that extends into all the major oceans and at which new oceanic lithosphere is created by the rise of magma from the earth’s interiorSee also sea-floor spreading.

How do you use mid ocean ridge in a sentence?

mid ocean ridge in a sentenceGeography and mid ocean ridges, contributed greatly to the theory of plate tectonics.The triple junctions in the New England region stopped subduction very quickly because the mid ocean ridge was almost parallel to the trench.More items…

What does Mid Ocean Ridge look like?

Ridge Types. In the Atlantic Ocean, the mid-ocean ridge is called the Mid-Atlantic Ridge. It curves from the Arctic Ocean southward, through Iceland, down the center of the Atlantic, and around the bottom of Africa. … Pacific Rise have smoother topography at the ridge crest, and look somewhat like domes.

Why is the Mid Atlantic Ridge important?

Mid-ocean ridges are geologically important because they occur along the kind of plate boundary where new ocean floor is created as the plates spread apart. Thus the mid-ocean ridge is also known as a “spreading center” or a “divergent plate boundary.” The plates spread apart at rates of 1 cm to 20 cm per year.

What is the difference between a rift valley and a mid ocean ridge?

The major difference between different types is what type of plate the divergent boundary is between. If the boundary is found between two continental plates you are left with a rift valley. … If two oceanic plates begin moving away from each other it creates a mid-oceanic ridge.

What is seafloor spreading?

Sea-floor spreading is what happens at the mid-oceanic ridge where a divergent boundary is causing two plates to move away from one another resulting in spreading of the sea floor. As the plates move apart, new material wells up and cools onto the edge of the plates.

What is a sentence for plate tectonics?

The scientists working on this project say the discovery could change theories on plate tectonics dramatically. In plate tectonics, fragments of crust move independently along the surface of the viscous mantle. The discovery of Earth’s stripes, in the 1960s, led geologists to accept the theory of plate tectonics.

What causes 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.

Where are the mid ocean ridges?

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 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.

Are there volcanoes at mid ocean ridges?

The vast majority of volcanic activity on the planet occurs along the mid-ocean ridge, and it is the place where the crust of the Earth is born. … The material that erupts at spreading centers along the mid-ocean ridge is primarily basalt, the most common rock on Earth.