Moho
The
Mohorovi?i? (
IPA: [m?h?'??v?t??t?])
discontinuity, usually referred to as the
Moho, is the boundary between the
Earth's
crust and the
mantle. The Moho serves to separate both
oceanic crust and
continental crust from underlying mantle. The Moho mostly lies entirely within the
lithosphere; only beneath
mid-ocean ridges does the Moho also define the
mesosphere-
asthenosphere boundary. The Mohorovi?i? discontinuity was first identified in 1909 by
Andrija Mohorovi?i?, a
Croatian seismologist, when he observed the abrupt increase in the velocity of
earthquake waves (specifically
P-waves) at this point.
Ophiolites are sections of
oceanic crust and possible mantle rock that have been
obducted into the
continental crust during
plate collisions.
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