Farmer, "3-D seismic discontinuity
for faults and stratigraphic features: the coherence cube," The Leading Edge, vol.
Others see cells originating at the 670 km seismic discontinuity
, or from mid-mantle depths below the discontinuity (Cserepes and Yuen, 2000).
Since residual peridotites outcrop, the seismic discontinuity
must reflect another type of boundary.
As a result of drilling, however, "everyone now agrees that the seismic discontinuity
[at Galicia] is not the brittle-ductile boundary," says Winterer, of Scripps Institution of Oceanography in La Jolla, Calif.