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We perform edge detection on the EGM96 global geodetic gravity field. The technique is in accord with our wavelet based multiscale edge analysis, which is valid for a flatearth approximation. For the spherical earth, it is not clear that the technique yields a formal wavelet transform. However, spherical results appear as interpretable as the flat-earth results at short scales. In Australia, we find general agreement with the flat-earth results, and note a correlation between results from seismic tomography and our present work.

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