TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

PARALLEL CLEAVAGE [16 records]

Record 1 2024-09-04

English

Subject field(s)
  • The Skin
CONT

Suprailiac skinfold is measured in the midaxillary line immediately superior to the iliac crest. The skinfold is picked up obliquely just posterior to the midaxillary line and parallel to the cleavage lines of the skin...

Key term(s)
  • suprailiac skin fold
  • suprailiac fat fold
  • supra-iliac skin fold
  • supra-iliac fat fold

French

Domaine(s)
  • Appareil cutané

Spanish

Save record 1

Record 2 2016-01-15

English

Subject field(s)
  • Tectonics
  • Geomorphology and Geomorphogeny
CONT

A combination of bedding and cleavage is a common example. In most cases such planar structures intersect, and the line of intersection is regarded as an intersection lineation.... Intersection lineations formed by the intersection of two tectonic foliations are also common. In most cases intersection lineations are related to folding, with the lineation running parallel to the axial trace and the hinge line.

French

Domaine(s)
  • Tectonique
  • Géomorphologie et géomorphogénie
DEF

[...] linéation [...] produite par le recoupement de deux familles de surfaces, en particulier par l'intersection d'une schistosité avec une surface de stratification, ou avec une schistosité ou une foliation antérieures.

Spanish

Campo(s) temático(s)
  • Tectónica
  • Geomorfología y geomorfogénesis
DEF

Lineación que viene marcada por la intersección de dos familias de superficies.

Save record 2

Record 3 2012-11-08

English

Subject field(s)
  • Optics
  • Mineralogy
DEF

The near total absorption of light moving through an anisotropic crystal at a direction parallel to the cleavage planes of that crystal.

French

Domaine(s)
  • Optique
  • Minéralogie
OBS

Le minéral est éteint lorsque la trace du clivage (qui est aussi la direction d'allongement) est parallèle à une des directions de la croix de l'oculaire).

Spanish

Save record 3

Record 4 2012-04-20

English

Subject field(s)
  • Mineralogy
CONT

When minerals break along planes of structural weakness, they have parting. The weakness may result from pressure or twinning; and is parallel to crystalographic directions and thus resembles cleavage. Parting unlike cleavage is not shown in all specimens but only occurs in those that have been twinned or subjected to the proper pressure.

OBS

parting: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Minéralogie
CONT

Il existe parfois des plans de séparation qui ne sont pas des clivages. Ces séparations (parting en anglais) ne sont pas directement liées à la structure du cristal mais s'expliquent par des variations dans la géométrie du réseau causées par un accident : altération, présence de macle, etc.

Spanish

Save record 4

Record 5 2011-02-03

English

Subject field(s)
  • Petrography
DEF

[A] cleavage that depends on the parallel arrangement of the mineral constituents of the rock and which developed during rock flowage.

CONT

Flow cleavage, a further development of slaty cleavage, in which further recrystallisation has taken place and reduced the traces of bedding to more vestiges.

OBS

flow cleavage: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Pétrographie
CONT

La schistosité de flux, qui se reconnaît à ce que les plans de division peuvent apparaître en tout point ou presque, tiendrait à une déformation de la masse de la roche [...]

OBS

schistosité de flux : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 5

Record 6 2011-01-26

English

Subject field(s)
  • Tectonics
  • Petrography
DEF

A foliation defined by elongated domains of quartz or feldspar aggregates separated by anastomosing, mica-rich laminae.

CONT

Slaty cleavage... develops in fine-grained rocks as a result of intense deformation, producing a partial recrystallisation of platy minerals parallel to the axial planes of the folds, i. e. perpendicular to the compressive forces. In general, this recrystallisation does not destroy all traces of bedding.

OBS

Slaty cleavage is the characteristic foliation in fine-grained sedimentary and volcanic rock deformed under archizone and lower greenschist metamorphic conditions.

OBS

slaty cleavage: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Tectonique
  • Pétrographie
CONT

Formation de schistosité ardoisière dans les terrains sédimentaires, à l'occasion d'un cisaillement [...] par rapport au socle [...]

CONT

Les phyllades (très durs et à schistosité marquée (clivage ardoisier)), ont été exploités comme ardoises pendant des siècles.

OBS

clivage ardoisier : caractéristique d'un faible degré de métamorphisme dans les roches métasédimentaires. La contrainte est due au poids des roches au-dessus et la roche se casse en feuilles parallèles le long du clivage ardoisier.

OBS

clivage ardoisier; schistosité ardoisière : termes en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 6

Record 7 2009-09-29

English

Subject field(s)
  • Tectonics
DEF

A ... cleavage in which the cleavage planes are spaced at regular intervals and separated by zones known as microlithons.

CONT

Spaced cleavage generally refers to discrete cleavage planes visible to the naked eye.

CONT

Spaced cleavage on the limbs of major folds also formed by dissolution. This is shown by(1) the presence of insoluble residues on the cleavage surfaces,(2) imbrication of insoluble chert nodules that indicates tens of percent shortening parallel to bedding,(3) deflection of cleavage away from strain shadows protected by chert nodules and toward places where the nodules have been telescoped, and(4) offsets of bedding at bedding-cleavage intersection that resulted from removal of limestone by dissolution along the cleavage surfaces.

OBS

spaced cleavage: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Tectonique
CONT

Dans les roches carbonatées assez pures, on observe plutôt un clivage espacé [...]

OBS

clivage espacé : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 7

Record 8 2009-03-04

English

Subject field(s)
  • Tectonics
CONT

A common example of elongation lineation is provided by elongated conglomerate pebbles.... Tectonically oriented conglomerate pebbles are elongated within cleavage planes, and the elongation may be many times that of naturally oblong pebbles. Common tectonic elongations are 1 : 2 and 1 : 3; elongations of 1 : 10 and more are known. Evidently, the direction of elongation of pebbles is a direction of elongation or flow of the whole rock. Such elongation may be parallel to axes of minor folds...

CONT

Textures attributable to tectonism include lineation or foliation of chromite and olivine, stretching, boudinage and "pull apart" of chromite grains, brecciation, and mylonitization.

OBS

stretching: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Tectonique
DEF

Allongement de couches ou d'objets antétectoniques sous l'effet de contraintes d'origine tectonique.

CONT

Les étirements marquent la déformation de certains éléments sous l'effet de contraintes tectoniques et se manifestent par un allongement selon la direction de la contrainte minimum [...]

CONT

Les structures qui sont imputables à des déformations tectoniques comprennent les linéations ou foliations définies par les cristaux de chromite et d'olivine; l'étirement, le boudinage et la fragmentation par étirement de grains de chromite; la bréchification; et la mylonitisation.

OBS

étirement : terme en usage à Ressources naturelles Canada - Secteur des Sciences de la Terre.

Spanish

Save record 8

Record 9 2009-02-03

English

Subject field(s)
  • Tectonics
DEF

One of numerous parallel surfaces of bedding or foliation which indicate directional properties in rock [and] may be warped.

CONT

Workers on petrofabrics correlate s-surfaces of all kinds with deforming movements, but do not attempt anything more than a very broad correlation with deforming forces. They have shown that several sets of schistosity-surfaces may originate in a single deformation (as Becker insisted), though it is also possible for a second schistosity to be superposed upon s-planes of an earlier deformation.

OBS

There is considerable confusion in the prevalent usage of terms such as schistosity, foliation, flow cleavage, fracture cleavage, etc., Sander... recommends the employment of a purely descriptive non-genetic term to cover the parallel fabrics of metamorphic rocks; he includes all such structures("sets of planes of mechanical inhomogeneity") in his term "s-surfaces"("s-planes").

OBS

The term "s-plane" refers more specifically to a planar surface.

OBS

schistosity: The property by virtue of which rocks cleave along surfaces (not necessarily plane) determined by crystallisation or mechanical deformation of the rock-forming material under the influence of stress or high temperature.

Key term(s)
  • s surface

French

Domaine(s)
  • Tectonique
CONT

On a pu se rendre compte après la rupture [...] que le rocher présente sur ces surfaces de foliation, une résistance à la traction et au cisaillement plus faible que dans les autres directions.

OBS

surface S : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 9

Record 10 2009-01-21

English

Subject field(s)
  • Tectonics
DEF

Cleavage which is closely related to the axial planes of folds in the rock, either being rigidly parallel to the axes, or diverging slightly on each flank(fan cleavage).

CONT

Folds range from open to isoclinal, and may be accompanied by a penetrative axial plane cleavage.

OBS

Most axial-plane cleavage is closely related to the minor folds seen in individual outcrops, but some is merely parallel to the regional fold axes. Most axial-plane cleavage is also slaty cleavage.

OBS

axial-plane cleavage: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • axial plane schistosity
  • axial-planar schistosity
  • axial-planar cleavage

French

Domaine(s)
  • Tectonique
DEF

Schistosité la plus courante caractérisée par une coïncidence stricte avec le plan axial des plis.

CONT

Les plis sont ouverts à fermés (isoclinaux) et un clivage de plan axial très bien développé (pénétratif) s'observe parfois.

CONT

Des plis isoclinaux serrés déforment les unités du gisement de Boliden et une schistosité de plan axial bien développée donne aux lithologies l'aspect d'une zone de cisaillement [...]

OBS

schistosité de plan axial; schistosité dans le plan axial; clivage dans le plan axial : termes en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 10

Record 11 2006-08-17

English

Subject field(s)
  • Mineralogy
  • Gemmology
DEF

A visible crystal line manifested on dodecahedral faces as a result of lamellar growth.

OBS

One of the very shallow, parallel depressions or narrow bands on the cleavage face of a mineral, caused by oscillation in growth between differently oriented faces(as in pyrite) or by repeated twinning lamellae in the growth of the crystal(as in plagioclase).

Key term(s)
  • striae

French

Domaine(s)
  • Minéralogie
  • Gemmologie
DEF

Ligne de cristallisation qui apparaît sur une face dodécaédrique suite à une croissance lamellaire.

CONT

[...] on pourra observer des stries, les faces seront alors dites striées; ceci pourra être dû soit à la présence de macles multiples qui se répètent [...], soit à la répétition de minuscules faces [...]

Key term(s)
  • stries

Spanish

Save record 11

Record 12 1999-10-01

English

Subject field(s)
  • Petrography
DEF

Cleavage that is parallel to the bedding plane.

French

Domaine(s)
  • Pétrographie

Spanish

Save record 12

Record 13 1999-10-01

English

Subject field(s)
  • Mineralogy
  • Petrography
DEF

A type of isometric crystal cleavage having cleavage planes parallel to the faces of a cube...

French

Domaine(s)
  • Minéralogie
  • Pétrographie
CONT

La direction d'un clivage est donnée par l'indice de la face à laquelle il est parallèle, par exemple : clivage cubique (100) de la galène, clivage octaédral (111) de la fluorine.

Spanish

Save record 13

Record 14 1999-09-17

English

Subject field(s)
  • Mineralogy
DEF

Mineral cleavage parallel to the basal pinacoid, e. g. in molybdenite.

French

Domaine(s)
  • Minéralogie
OBS

Le clivage est la propriété que présentent de nombreux minéraux pouvant se rompre suivant des surfaces planes, parallèles aux faces des cristaux.

Spanish

Save record 14

Record 15 1998-09-29

English

Subject field(s)
  • Mineralogy
  • Metallography
CONT

The direction of cleavage of a crystal are always parallel to a possible face of the crystal, in which the molecules are most closely packed and across which the cohesion is a minimum.

French

Domaine(s)
  • Minéralogie
  • Métallographie

Spanish

Save record 15

Record 16 1997-02-18

English

Subject field(s)
  • Mineralogy
DEF

In mineralogy, having a cleavage parallel with the base or top.

French

Domaine(s)
  • Minéralogie

Spanish

Save record 16

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