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Science 9 June 1995:
Vol. 268. no. 5216, pp. 1468 - 1471
DOI: 10.1126/science.268.5216.1468
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Articles

Lehmann Discontinuity as the Base of an Anisotropic Layer Beneath Continents

James B. Gaherty 1 and Thomas H. Jordan 1

1 Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Long-period surface-wave (R1, G1), body-wave (S, SS, SSS), and ScS-reverberation data have been inverted to obtain anisotropic structures along seismic corridors that sample Australia and the western Pacific. These models support the proposal that the Lehmann discontinuity beneath stable continents represents a transition from an anisotropic lithosphere to a more isotropic material in the lower part of the continental tectosphere.

Submitted on January 4, 1995
Accepted on March 23, 1995


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