** Figure F15.** Interpretation of the shape of AMS data. Top balloons illustrate isotropic, oblate, prolate, and triaxial ellipsoids from left to right. A–D. Selected data sets plotted as eigenvector directions on equal-area projections from individual samples. Squares = directions associated with maximum eigenvalues, triangles = directions associated with intermediate eigenvalues, circles = directions associated with minimum eigenvalues. E–H. Bootstrapped eigenvectors from A–D, respectively. I–L. Cumulative distributions of the bootstrapped eigenvalues associated with the eigenvectors plotted in E–H. Bounds containing 95% of each eigenvalue: blue dash-dot lines = minimum eigenvector τ_{3}, black dashed lines = intermediate τ_{2}, solid red lines = maximum τ_{1}. Figure from Tauxe (2010).

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