The property, possessed by some crystalline rocks, of dividing into plates or slabs, which is due to the cleavage structure of one of the constituents, as mica or hornblende. It may sometimes include slaty structure or cleavage, though the latter is usually independent of any mineral constituent, and transverse to the bedding, it having been produced by pressure.
Process where once randomly distributed platy minerals in a rock become reoriented, because of metamorphism, in a parallel manner.
A rock texture formed by alignment of sheet-like features or grains.
A set of flat or wavy planes in a metamorphic rock, produced by structural deformation.
A laminated structure on rock caused by the segregation of different minerals into layers.
Layering formed as a consequence of the alignment of mineral grains, or of compositional banding in a metamorphic rock.
orientation of minerals in a rock due to deformational process
The planar or layered characteristics of metamorphic rocks that are evidence of the pressures and/or temperatures to which the rock was exposed. These can be structural such as cleavage, textural such as mineral grain flattening or elongation, or compositional such as mineral segregation banding.
The arrangement of a set of minerals in parallel, sheet-like layers that lie perpendicular to the flattened plane of a rock. Occurs in metamorphic rocks on which directed pressure has been exerted.
The structure, similar to but less regular and perfect than cleavage, by which the minerals in rocks such as schist and gneiss are arranged in parallel planes due to metamorphism.
(geology) the arrangement of leaflike layers in a rock
Alignment of minerals into parallel layers; can be planes of weakness in rocks.
The layering or banding that develops in a glacier during the process of transformation of snow to glacier ice. Individual layers, called folia, are visible because of differences in crystal or grain size, alternation of clear ice and bubbly ice, or because of entrained sediment.
The layered or banded structure of rock in which the mineral grains became re-aligned at right angles to a directional force that existed during metamorphism.
The bands of mineral crystals that occur in metamorphic rocks
The layer like alignment of crystals in metamorphic rocks.
Aligned layers of minerals characteristic of some metamorphic rocks. Foliation forms in metamorphic rocks when pressure squeezes flat or elongates minerals so that they become aligned. These rocks develop a platy or sheet-like structure that reflects the direction that pressure was applied. more details...
(fo-li-a´-tion) The planar arrangement of textural or structural features in any type of rock; esp. the planar structure that results from flattening of the constituent grains of metamorphic rock. The layered structure produced in the ice of a glacier by plastic deformation.
structure of metamorphic granular rocks having layers rich in micas flakes.
layering in glacier ice that has distinctive crystal sizes and/or bubbles; foliation is usually caused by stress and deformation that a glacier experiences as it flows over complex terrain, but can also originate as a sedimentary feature.
Foliation is any penetrative planar fabric present in rocks. Foliation is common to rocks affected by regional metamorphic compression typical of orogenic belts. Rocks exhibiting foliation include the typical metamorphic rock sequence of slate, phyllite, schist and gneiss.