  We study some dynamical properties of a family of two-dimensional cellular
automata: those that arise from an underlying one dimensional sand automaton
whose local rule is obtained using a latin square. We identify a simple sand
automaton G whose local rule is algebraic, and classify this automaton as
having equicontinuity points, but not being equicontinuous. We also show it is
not surjective. We generalise some of these results to a wider class of sand
automata.
