What is Repetti discontinuity?

The discontinuity between the upper mantle and the lower mantle is known as Repetti Discontinuity. The portion of the mantle which is just below the lithosphere and asthenosphere, but above the core is called as Mesosphere.

What is Gutenberg discontinuity in geography?

The Gutenberg discontinuity occurs within Earth’s interior at a depth of about 2,900 km (1,800 mi) below the surface, where there is an abrupt change in the seismic waves (generated by earthquakes or explosions) that travel through Earth.

What does the Repetti Discontinuity separates?

Repetti Discontinuity: This separates the upper mantle from the lower mantle.

What is meant by Conrad discontinuity?

From Wikipedia, the free encyclopedia. The Conrad discontinuity corresponds to the sub-horizontal boundary in continental crust at which the seismic wave velocity increases in a discontinuous way.

Who found Repetti Discontinuity?

In the year of 1912 Weichert Gutenberg was discovered this discontinuity at the depth of 2900km beneath the earth surface. In this zone the velocity of seismic waves changes suddenly.

What is Gutenberg discontinuity Class 9?

Gutenberg Discontinuity is the boundary between mantle and core. It is found at about 8 km beneath the oceans and about 32 km beneath the continents. It begins at a depth of 2800 km.

Where is the Repetti discontinuity located?

The discontinuity between the upper mantle and the lower mantle is known as Repetti Discontinuity. The portion of the mantle which is just below the lithosphere and asthenosphere, but above the core is called as Mesosphere.

What is asthenosphere Upsc?

The asthenosphere is the upper portion of Mantle. It is the chief source of magma that finds its way to the surface during volcanic eruptions. The crust and the uppermost part of the mantle are called the lithosphere.

Who discovered Conrad discontinuity?

Weichert Gutenberg

In the year of 1912 Weichert Gutenberg discovered this discontinuity at the depth of 2900 km beneath the earth surface. In this zone the velocity of seismic waves changes suddenly.

Who discovered Lehmann discontinuity?

seismologist Inge Lehmann

The Lehmann discontinuity is an abrupt increase of P-wave and S-wave velocities at the depth of 220 km (140 mi), discovered by seismologist Inge Lehmann.

What is the Lehmann discontinuity made of?

Her interpretation of this data was the foundation of a 1936 paper in which she theorized that Earth’s center consisted of two parts: a solid inner core surrounded by a liquid outer core, separated by what has come to be called the Lehmann Discontinuity.

What does the Lehmann discontinuity separate?

The boundary between the inner and outer core, which occurs at a depth of roughly 5,100 km (about 3,200 miles), is known as the Lehmann discontinuity. Lehmann is also known for researching Earth’s mantle.

What is the other name of Lehmann discontinuity?

The other two discontinuities are well known by names honoring their discoverers, Andrija Mohorovicic and Beno Gutenberg. In this tradition, it is fitting that the ICB be called the Lehmann Discontinuity in honor of its discoverer.
Abstract.

Where is asthenosphere found?

The asthenosphere is located in the upper mantle just below the lithosphere.

What is the function of the asthenosphere?

The asthenosphere acts as the lubricating layer below the lithosphere that allows the lithosphere to move over the Earth’s surface.

What is the scientific definition of asthenosphere?

asthenosphere, zone of Earth’s mantle lying beneath the lithosphere and believed to be much hotter and more fluid than the lithosphere. The asthenosphere extends from about 100 km (60 miles) to about 700 km (450 miles) below Earth’s surface.

What is an example of asthenosphere?

Asthenosphere definition

A zone in the upper mantle of the earth, consisting of hot, plastic rock, that underlies the solid lithosphere. (geology) The zone of the Earth’s upper mantle, below the lithosphere. The upper part of the Earth’s mantle, extending from a depth of about 75 km (46.5 mi) to about 200 km (124 mi).

What is asthenosphere made of?

The Asthenosphere is made up of semi-plastic rock. Since the Lithosphere has a lower density, it floats on top of the Asthenosphere similar to the way in which an iceberg or a block of wood floats on water. The lower mantle below the Asthenosphere is more rigid and less plastic.

What does the asthenosphere contain?

The asthenosphere is a part of the upper mantle just below the lithosphere that is involved in plate tectonic movement and isostatic adjustments. It is composed of peridotite, a rock containing mostly the minerals olivine and pyroxene.

What are the core properties of asthenosphere?

The asthenosphere is also known as the “low velocity” zone of the mantle because seismic waves slow down as they pass through it. This property tells us that the asthenosphere is composed of partially molten rock slushlike material consisting of solid particles with liquid occupying spaces in between.

Is the asthenosphere like magma?

The lithosphere floats on a layer of hot magma called the asthenosphere. The asthenosphere has a convection current, made by magma swirling around in a circular motion, from top to bottom.

Which statement describes a characteristic of the asthenosphere?

Asthenosphere refers to the mechanically weak, highly viscous, and ductility deforming segment of the upper mantle of the Earth. It is situated below the lithosphere, at the depths between about km underneath the surface.

What is the density of the asthenosphere?

about 3.3 g/cc.

-Asthenosphere – mean density about 3.3 g/cc. Denser and hotter than lithosphere above. under tremendous pressure and heat so that it is “soft”, near melting point, and flows plastically.

Why is the asthenosphere denser than the lithosphere?

That is why the lithosphere is made up of tectonic plates. The asthenosphere is hotter and denser than the lithosphere and is under much more pressure. That is part of why the rocks in the asthenosphere can flow. They also have different minerals.

Is the asthenosphere less dense than the lithosphere?

-Lithosphere – less dense and cooler than asthenosphere. It is solid, hard, brittle material. The lithosphere actually includes both the uppermost mantle and the crust.