  We give a general lower bound for the normal Gromov norm of genuine
laminations in terms of the topology of the complementary regions.
  In the special case of 3-manifolds, this yields a generalization of Agol's
inequality from incompressible surfaces to tight laminations. In particular,
the inequality excludes the existence of tight laminations with nonempty guts
on 3-manifolds of small simplicial volume.
