MohoroviÄić Discontinuity - The Moho
Article by: Hobart M. King, Ph.D., RPG
The Moho: Image of Earth's internal structure by USGS - Mohorovicic Discontinuity (red line) added by Geology.com.
What is the MohoroviÄić Discontinuity?
The Mohorovicic Discontinuity, or "Moho," is the boundary between the crust and the mantle. The red line in the diagram shows its location.
In geology the word "discontinuity" is used for a surface at which seismic waves change velocity. One of these surfaces exists at an average depth of 8 kilometers beneath the ocean basin and at an average depth of about 32 kilometers beneath the continents. At this discontinuity, seismic waves accelerate. This surface is known as the Mohorovicic Discontinuity or often simply referred to as the "Moho."
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