Foliation is usually formed by the preferred orientation of minerals within a rock. Usually, this is the result of some physical force and its effect on the growth of minerals.

In mathematics (differential geometry), a foliation is an equivalence relation on an n -manifold, the equivalence classes being connected, injectively immersed submanifolds, all of the same dimension p, modeled on the decomposition of the real coordinate space Rn into the cosets x + Rp of the standardly embedded subspace Rp.

Foliation, planar arrangement of structural or textural features in any rock type but particularly that resulting from the alignment of constituent mineral grains of a metamorphic rock of the regional variety along straight or wavy planes. Foliation is exhibited most prominently by sheety minerals.

Breaks along planes of weakness within a rock that are caused by foliation are referred to as rockcleavage (or just cleavage if everyone in the conversation knows we’re talking about rocks, not minerals).

Nov 21, 2023 · Discover the causes of foliation in metamorphic rocks. Understand foliation differences, and investigate examples of slate, schist, and gneiss foliation. Updated: 11/21/2023

Sep 2, 2022 · Foliation is a planar structure given by preferred orientation of minerals generally showing a platy or tabular habit. The preferred orientation is produced by deformation and is uniformly pervasive in a rock.

Jun 5, 2020 · The notion of a foliation evolved in the 1940s in a series of papers of G. Reeb and Ch. Ehresmann, culminating in the book [1] (for its history, see [2]), and was concerned with passing to the global point of view.

Apr 8, 2024 · Lineation refers to linear features within rock, often due to mineral alignment, while foliation involves the planar arrangement of mineral grains or structures in metamorphic rock.

lineation foliation Figure 8.24: Aligned crystals of black hornblende give this rock lineation. The crystals are up to 2 cm long. Figure 8.25: Foliated metamorphic rock (slate) with a bedding plane. A quarter for scale. foliation

Foliation is the planar arrangement found as a part of the structural or textural features present in any rock type, particularly the one that results from the mineral grains that are found in the metamorphic rocks typically forming a part of straight or wavy planes.