A seven-element list containing seven vectors displaying the depth
variation of induced stresses due to a point load following the Boussinesq
method: depth = vector of depths, sigmaX = induced horizontal stress in the
x direction, sigmaY = induced horizontal stress in the y direction, sigmaZ
= induced vertical stress, tauZX = induced shear stress on the ZX plane,
tauYX = induced shear stress on the YX plane, tauYZ = induced shear stress
on the YZ plane