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Figure F17. Plots of natural remanent magnetization (NRM) after alternating field (AF) demagnetization to 80 mT A. Sample 347-M0062A-6H-2, 105 cm; 16.64 mcd. B. Sample 347-M0062A-2H-2, 60 cm; 2.61 mcd. C. Sample 347-M0062-A-10H-1, 10 cm; 27.44 mcd. Categories 1 and 3 contain a vector that trends toward the origin during demagnetization, but it veers into a plane perpendicular to the last demagnetization axis, which is a sign of gyroremanent magnetization acquisition. The acquisition of GRM is most apparent in Category 3 (Sample 347-M0062A-6H-2, 105 cm). Category 2 contains a stable single-component NRM. Open squares = vertical, solid squares = horizontal.

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