Question

Q. Consider the following pairs:

Discontinuity	Location
1. Conrad Discontinuity.	between the upper and lower crust
2. Mohorovicic discontinuity	between the outer core and the inner core
3. Repetti Discontinuity	between the upper mantle and the lower mantle
4. Guttenberg Discontinuity.	between the Earth's crust and the mantle.

Which of the pairs given above is/are correctly matched?

• A. 1 and 4 only
• B. 2 and 3 only
• C. 1, 2 and 4 only
• D. 1 and 3 only

Answer 1

The correct option is D 1 and 3 only

Explanation:

• The discontinuity between the upper and lower crust is called the Conrad Discontinuity.
• The Mohorovicic discontinuity usually referred to as the Moho discontinuity, is the boundary between the Earth's crust and the mantle. It occurs at an average depth of about 8 kilometers beneath the ocean basins and 32 kilometers beneath continental surfaces.
• The discontinuity between the upper mantle and the lower mantle is known as Repetti Discontinuity.
• The outer core is separated from the inner mantle by Guttenberg Discontinuity.
• The discontinuity between the outer core and the inner core is called Lehmann Discontinuity.