The inversion of oceanic magnetic anomaly data to obtain the crustal magnetization requires some assumptions regarding the magnetization distribution (Parker and Huestis, 1974). Two simplifying assumptions typically made for data near ridge systems are that the source magnetization is lineated parallel to the ridge system and that it is unidirectional. These assumptions follow directly from the theory of plate tectonics and have been used near the major ridge systems of the world. The presence of transform faulting can offset the lineations usually observed and render the first assumption invalid. In this note, only those cases in which both assumptions are valid will be considered.

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