Abstract
It is shown in this paper that it is possible to use remanent magnetism as a tool for geologic classification, Several suites of diabase dikes from Ontario and Quebec were sampled and widely differing magnetic properties found. It is shown that the direction of remanent magnetization, as well as the intensity, forms separate and distinct criteria for distinguishing between swarms. An earlier paper indicated that the direction of stable remanent magnetization is distorted by the shape of the dike. In spite of this distortion, widely differing directions of remanent magnetization indicate that the magnetic field of the earth existed in Precambrian times and that it wandered considerably in that era.
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