Abstract

It is generally conceded that estimates of depths to magnetic sources using the methods of Vacquier et al (1951) may be 10 percent or more in error, even for anomalies well-suited to depth estimates. Where conditions are less favorable--for example, where the anomaly-producing masses differ in magnetization or shape from the assumed uniformly magnetized vertical prisms--the errors may be much larger. In my opinion, therefore, Dr. Steenland has attempted to obtain more from the magnetic data than is warranted.

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