Figure F32. Representative vector endpoint diagrams (Zijderveld, 1967) of magnetization directions through stepwise AF demagnetization for (A, B) samples from APC cores, showing the steep downward component of magnetization imparted by the coring process is easily removed by AF demagnetization, (C) sample from an XCB core with well-defined characteristic remanent magnetization, and (D) sample from an XCB core with strong drilling overprint. Open squares and solid circles represent the projection of the magnetization vector endpoints onto the vertical and horizontal planes, respectively. NRM = natural remanent magnetization.
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