  We construct a co-$t$-structure on the derived category of coherent sheaves
on the nilpotent cone $\mathcal{N}$ of a reductive group, as well as on the
derived category of coherent sheaves on any parabolic Springer resolution.
These structures are employed to show that the push-forwards of the "exotic
parity objects" along the (classical) Springer resolution give indecomposable
objects inside the coheart of the co-$t$-structure on $\mathcal{N}$. We also
demonstrate how the various parabolic co-$t$-structures can be related by
introducing an analogue to the usual translation functors. As an application,
we give a proof of a scheme-theoretic formulation of the relative Humphreys
conjecture on support varieties of tilting modules in type $A$ for $p>h$.
