  In a uniform layer consisting of a mixture of granular material and liquid,
it is known that desiccation cracks exhibit various anisotropic patterns that
depend on the nature of the shaking that the layer experienced before drying.
The existence of this effect implies that information regarding the direction
of shaking is retained as a kind of memory in the arrangements of granular
particles. In this work we make measurements in paste composed of Lycopodium
powder using microfocus x-ray computerized tomography ($\mu$CT) in order to
investigate the three-dimensional arrangements of particles. We find
shaking-induced anisotropic arrangements of neighboring particles and density
fluctuations forming interstices mainly in the lower part of the layer. We
compare the observed properties of these arrangements with numerical results
obtained in the study of a model of non-Brownian particles under shear
deformation. In the experimental system, we also observe crack tips in the
$\mu$CT images and confirm that these cracks grow along interstices in the
direction perpendicular to the initial shaking.
