  The formation of textured patterns has been predicted to occur in two stages.
The first is an early time, domain-forming stage with dynamics characterized by
a disorder function $\bar\delta (\beta) \sim t^{-\sigma_{E}}$, with $\sigma_{E}
= {1/2}\beta$; this decay is universal. Coarsening of domains occurs in the
second stage, in which $\bar\delta (\beta) \sim t^{-\sigma_{L}}$, where
$\sigma_{L}$ is a nonlinear function of $\beta$ whose form is system and model
dependent. Our experiments on a vertically oscillated granular layer are in
accord with theory, yielding $\sigma_{E}\approx 0.5\beta$, and $\sigma_{L}$ a
nonlinear function of $\beta$.
