Quick Answer: How Does The Age Of The Rock Change As You Move Away From Mid Ocean Ridge?

Does the age of the rock increase or decrease as you move away from the mid ocean ridge?

The age, density, and thickness of oceanic crust increases with distance from the mid-ocean ridge.

The magnetism of mid-ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century.

Oceanic crust slowly moves away from mid-ocean ridges and sites of seafloor spreading..

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 happens 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.

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.

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.

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.

What is the oldest rock on Earth?

BedrockBedrock along the northeast coast of Hudson Bay, Canada, has the oldest rock on Earth. Canadian bedrock more than 4 billion years old may be the oldest known section of the Earth’s early crust.

What is the oldest rock layer?

The ages of these felsic rocks are generally between 2.5 and 3.8 billion years. The approximate ages have a margin of error of millions of years. In 1999, the oldest known rock on Earth was dated to 4.031 ±0.003 billion years, and is part of the Acasta Gneiss of the Slave craton in northwestern Canada.

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 molten materials will come out from the ridge?

A ridge forms along a crack in the oceanic crust. At a mid-ocean ridge, molten material rises from the mantle and erupts. The molten material then spreads out, pushing older rock to both sides of the ridge. As the molten material cools, it forms a strip of solid rock in the center of the ridge.

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 happens to the age of seafloor rocks moving away from a mid ocean ridge quizlet?

New ocenaic crust is hot. But as it moves away from the mid-ocean ridge, it cools and becomes more dense. Eventually, gravity pulls this older, denser oceanice crust down beneath the trench.

What is the oldest type of rock on Earth?

zirconsRock Type(s): zircon The Jack Hills Zircon is believed to be the oldest geological material ever found on Earth, dating back to about 4.375 billion years, give or take 6 million years – the zircons are not technically rocks, but we felt that they should be included on this list.

Where are the youngest rocks found?

The youngest rock in the Earth’s crust is found at recent volcanic eruptions and at mid-ocean ridges.

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.