0 a process in which rocks divide into thin layers that can be separated, or the layers themselves:
Pressure concentrated in opposing directions often causes foliation in rocks.
The presence of foliation is a clue to metamorphic rocks.
The resulting foliation is coarser and more distinct than that of slate.
Rock foliations and lineations are indistinct or lacking.
Commonly a lineation lies in the plane of a foliation in the same rock.
Regional metamorphism frequently causes foliation.
In particular, we obtain rigid foliations of all degrees.
Bounds on distortion involve very technical and fastidious estimates on the differentiability of the invariant foliations (stable and unstable).
In particular, the strong stable and strong unstable foliations are smooth.
One can also work directly with vector fields instead of foliations.
