Abstract
Comparison of travel-time and amplitude data from two Oblique Seismic Experiments located on 110 m.y. old oceanic crust in the western Atlantic and northwestern Pacific Oceans shows that compressional velocities within layer 2 are, within experimental error, identical at the two sites. This result implies that, at least for 110 m.y. old crust, the velocity structure in layer 2, where extrusive lavas grade downward into a sheeted dike complex, is independent of the spreading rate at which the crust was created.
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