Shear zones accommodate compressive stress by movement on foliation planes. The foliation in slate is called "slaty cleavage". The flow generates a 1-dimensional foliation formula 50. Usually diagenesis results in a weak bedding-plane foliation. Cleavage is a type of secondary foliation associated with fine grained rocks. Note that due to monodromy global transversal sections of the foliation might not exist. The induced foliations of are called the 2-dimensional Reeb foliation (of the annulus) resp. "Crenulation cleavage" and "oblique foliation" are particular types of foliation. This is called a local "transversal" "section" of the foliation. A foliation is denoted by formula 24={"L"}. Crenulation cleavage contains microlithons that were warped by a previous foliation. For example, an F fold should have an S axial foliation. Lack of such exposure results in delayed and substandard foliation, flowering and fruiting. The equivalence classes are called the leaves of the foliation. Some authors chose to use cleavage when describing any form of secondary foliation.