ACKNOWLEDGMENTS

This work was made possible by cooperation among many persons, not all represented in the authorship. A. Vesnaver made the tomographic inversion codes available. F. Poletto allowed the performance of the VSP data processing. K.L. Hatfield and A.J. Evans (shipboard physical properties specialists) contributed with onboard data collection. L. Sormani and C. Pelos helped process OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale) site-survey MCS data. The manuscript was improved by the comments of Christian Bücker.

This study was funded by P.N.R.A (Progetto Nazionale di Ricerche in Antartide).

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