Figure F34. Vector end-point diagrams (Zijderveld, 1967). A. Stepwise AF demagnetization displaying a reversed vertical component of magnetization caused by drilling that is removed after 5 mT demagnetization (Sample 344-U1380C-51R-2W, 65–67 cm). B, C. Pass-through measurements of Section 344-U1380C-51R-2A corresponding to the depth of the discrete sample in A, showing the removal of a normal vertical component of magnetization, suggesting the sample in A has an orientation error of 180° in the z-direction. Open and solid squares = projection of the magnetization vector end-points onto the vertical and horizontal planes, respectively. NRM = natural remanent magnetization.
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