Abstract
A POSSIBLE shock-induced remanent magnetisation, the direction of which yields a typical ‘Grenville’ pole position has been discovered from late Precambrian Keweenawan igneous rocks (about 1,100 Myr old) on the Slate Islands, situated in northern Lake Superior about 300 miles north-west of the Grenville Front.
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HALLS, H. Shock-induced remanent magnetisation in late Precambrian rocks from Lake Superior. Nature 255, 692–695 (1975). https://doi.org/10.1038/255692a0
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DOI: https://doi.org/10.1038/255692a0
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