What is discontinuity in geology?
Geological discontinuity is normally recognised as a general term to describe any mechanical break (lacking significant tensile strength) within rock masses, including most joints, weak bedding planes, weakness zones and faults (ISRM, 1978).
What does discontinuity mean in geography?
A zone that marks a boundary between different layers of the Earth, such as between the mantle and the core, and where the velocity of seismic waves changes.
What is Mohorovičić discontinuity in geography?
The Moho is the boundary between the crust and the mantle in the earth. This is a depth where seismic waves change velocity and there is also a change in chemical composition. Also termed the Mohorovicic’ discontinuity after the Croatian seismologist Andrija Mohorovicic’ (1857-1936) who discovered it.
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 is a discontinuity in rock mass?
4 Rock discontinuities 4.1 INTRODUCTION “Discontinuity” is a general term denoting any separation in a rock mass having zero or low tensile strength. It is the collective term for most types of joints, weak bedding planes, weak schistocity planes, weakness zones, and faults (ISRM, 1978c).
What is discontinuity in rock mechanics?
discontinuity in a rock mass. Discontinuities include all types of mechanical break or plane of weakness in rock mass such as joints, bedding plane, fractures and shear zones that weakened the strength of rock masses.
What is discontinuity in geography Upsc?
Conrad Discontinuity: Transition zone between SIAL and SIMA, Mohorovicic Discontinuity: Transition zone between the Crust and Mantle, Repiti Discontinuity: Transition zone between Outer mantle and Inner mantle, Gutenberg Discontinuity: Transition zone between Mantle and Core, Lehman Discontinuity: Transition zone …
What is another term for discontinuity?
In this page you can discover 20 synonyms, antonyms, idiomatic expressions, and related words for discontinuity, like: , divergence, perturbation, space/time, circularity, polarisation, asymmetry, break, discontinuance, discontinuation and disruption.
What is Mohorovičić and Gutenberg discontinuity?
Moho Discontinuity is the boundary between crust and mantle. 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.
Who discovered Conrad discontinuity?
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.
What is mohorovičić and Gutenberg discontinuity?
Moho Discontinuity is the boundary between crust and mantle. Gutenberg Discontinuity is the boundary between mantle and core.
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. It appears beneath continents, but not usually beneath oceans, and does not readily appear in globally averaged studies.
What is a discontinuity in geology?
A discontinuity in geology is an area in the earth where the speed of earthquakes changes. The best known discontinuity is the Mohorovicic Discontinuity which is know as the Moho for short. This is the division between the crust and the mantle.
What is the distance between discontinuities called?
The distance between discontinuties taken perpendicular from the discontinuity plane is called spacing. This spacing can be quite variable like for the vertical discontinuities on the figure or fairly constant like for the horizontal discontinuities on this figure. If there is a lot of variation in the spacing, on average value would be considered.
What is Mohorovicic discontinuity in geology?
The Mohorovicic Discontinuity was discovered in 1909 by Andrija Mohorovicic, a Croatian seismologist. Mohorovicic realized that the velocity of a seismic wave is related to the density of the material that it is moving through. He interpreted the acceleration of seismic waves observed within Earth’s outer shell as a compositional change within
What are parallel discontinuities in rock mass?
A rock mass typically includes many discontinuities, come of which are parallel. This is the case on this figure with the horizontal discontinuities and the vertical discontinuities. The distance between discontinuties taken perpendicular from the discontinuity plane is called spacing.