  A new class of random spatial tessellations is introduced -- the so-called
column tessellations of three-dimensional space. The construction is based on a
stationary planar tessellation. Each cell of the spatial tessellation is a
prism whose base facet is congruent to a cell of the planar tessellation. Thus
intensities, topological and metric mean values of the spatial tessellation can
be calculated by suitably chosen parameters of the planar tessellation. A
column tessellation is not facet-to-facet.
