Abstract

Computation of first and second vertical derivatives of gravity gives rise to anomalies that suggest local features which do not really exist; on the average, two to four such fictitious anomalies appear for every true anomaly, and they are often strong enough to be misleading. An attempt is made here to show how they occur. Inherent limitations in the interpretation methods based on derivatives which cannot be overcome by improvements in the methods of computing derivatives, are evident.

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