LIST OF ILLUSTRATIONS Map of the test region examined in this Study.

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Form taken by the low-pass filter in both the spatial and frequency domains.. . i. .. Complete Bouguer anomalies interpolated to a regular grid (GPGV) .before filtering.. . Result of the low-pass filtering operation on the observed gravity field.. .. .. .. . High frequency perturbations about zero which were removed from the complete Bouguer anomalies (GPGV) in the low-pass filtering operation.