Life

What is Gutenberg discontinuity ICSE?

What is Gutenberg discontinuity ICSE?

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.

What is the function of the Gutenberg?

Thus, Gutenberg established an accurate boundary line — or discontinuity — that separates and divides the lower mantle from the outer core. The lower mantle above the Gutenberg line is solid, but the outer core below the line is liquid molten.

What is Gutenberg discontinuity at what depth does it begin?

The mantle–core boundary is the Gutenberg discontinuity at a depth of about 2,800 kilometres. The outer core is thought to be liquid because shear waves do not pass through it.

Who discovered Gutenberg discontinuity?

Beno Gutenberg
The Gutenberg discontinuity was named after Beno Gutenberg (1889-1960) a seismologist who made several important contributions to the study and understanding of the Earth’s interior. It has also been referred to as the Oldham-Gutenberg discontinuity, or the Wiechert-Gutenberg discontinuity.

What is Conrad separation?

The Conrad discontinuity corresponds to the sub-horizontal boundary in continental crust at which the seismic wave velocity increases in a discontinuous way. The Conrad discontinuity (named after the seismologist Victor Conrad) is considered to be the border between the upper continental crust and the lower one.

Who discovered Mohorovicic discontinuity?

Andrija Mohorovičić
Earth sciences: Seismology and the structure of Earth 8, 1909, the geophysicist Andrija Mohorovičić discovered the discontinuity (often called the Moho) that……

What is lemon discontinuity?

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. The thickness is 220 km. Further discussion of the Lehmann discontinuity can be found in the book Deformation of Earth Materials by Shun-ichirō Karato.

What is the difference between lithosphere and asthenosphere?

The lithosphere (litho:rock; sphere:layer) is the strong, upper 100 km of the Earth. The lithosphere is the tectonic plate we talk about in plate tectonics. The asthenosphere (a:without; stheno:strength) is the weak and easily deformed layer of the Earth that acts as a “lubricant” for the tectonic plates to slide over.

Which discontinuity did Conrad discover discontinuity between the?

The Conrad discontinuity (named after the seismologist Victor Conrad) is considered to be the border between the upper continental crust and the lower one. It is not as pronounced as the Mohorovičić discontinuity, and absent in some continental regions.

What is Connor discontinuity?

What is discontinuity in geography?

a. a zone within the earth where a sudden change in physical properties, such as the velocity of earthquake waves, occurs. Such a zone marks the boundary between the different layers of the earth, as between the core and mantle. See also Mohorovičić discontinuity.

What is meant by mohorovičić discontinuity?

noun. the boundary between the earth’s crust and mantle, across which there is a sudden change in the velocity of seismic wavesOften shortened to: Moho.

What was the purpose of the Gutenberg discontinuity?

Gutenberg Discontinuity. (seismic wave guide), the stratum in which seismic waves move at decreased velocities in the upper mantle of the earth.

How big is the Wiechert-Gutenberg discontinuity?

…its underlying mantle, and the Wiechert– Gutenberg Discontinuity, which separates the mantle from the core. The latter discontinuity exists at a depth of 2,900 kilometres (1,800 miles); it is marked by a sudden increase in density, from about 5.7 at the base of the mantle to 9.7 at the top of…

Is the outer core of the Gutenberg discontinuity liquid?

The mantle–core boundary is the Gutenberg discontinuity at a depth of about 2,800 kilometres. The outer core is thought to be liquid because shear waves do not pass through it.

How is the Gutenberg discontinuity related to seismic waves?

In certain places the Gutenberg discontinuity is absent or only the velocities of transverse seismic waves are decreased. It is conjectured that the cause of the slower passage of seismic waves is a large geothermal gradient, or a temperature close to the melting point. This gives reason to equate the Gutenberg discontinuity with the asthenosphere.

Share this post