  The moduli space of slope-stable vector bundles on a normal projective
variety over an algebraically closed field of characteristic $p\geq 0$ is
stratified with respect to the decomposition type. On a smooth projective curve
of genus at least 2 we obtain mostly sharp dimension estimates for these
strata.
  As an application, we obtain a dimension estimate for the closure of the
prime to p trivializable stable bundles in the moduli space of stable vector
bundles.
