The sometimes magnesium rich Mohorovi?i? discontinuity, which often is called simply 'Moho', separates the earth's crust and the cooler part of the planet's mantle.

A vertical asymptote can be, but need not be a discontinuity. In simple terms, the distinction depends whether the domain extends on only one side of the (no discontinuity) or both sides (infinite discontinuity).

For example, there is no discontinuity in f(x) = 1/x for x > 0

On the other hand, f(x) = 1/x for x ≠ 0 has an infinite discontinuity at x = 0.

The zone of discontinuity in the density between mantle and core is known as gutenburg discontinuity.

The Discontinuity Guide was created in 1995.