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The Late Devonian Mount Waldo pluton is a porphyritic granite that has a magmatic foliation and lineation. Foliation is defined by: (1) preferred orientation of potassium feldspar phenocrysts and biotite crystals, and (2) the anisotropy of magnetic susceptibility (AMS). AMS alone defines the lineation. The carrier of the AMS signal is multidomain magnetite, confirmed by petrographic observation, high...