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

S-PLANE [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2009-02-13

English

Subject field(s)
  • Tectonics
  • Calcareous Rock (Quarrying)
DEF

Plane with parallel alignment to structural features of a rock.

CONT

If a rock is subjected to two separate deformations and the second deformation is at some other angle to the original, growth of new micas on the foliation planes will create a new foliation plane perpendicular to the plane of principal stress.

OBS

The terms "s-plane" and "s-surface" are not exact synonyms. While the "s-surface" may have a warped shape, the "s-plane" corresponds more specifically to a planar surface.

OBS

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

Key term(s)
  • s plane

French

Domaine(s)
  • Tectonique
  • Carrières de roches calcaires
CONT

Dans les ectinites, et surtout dans les micaschistes, où la texture feuilletée prédomine nettement, ce sont les plans de schistosité ou de foliation qui interviennent. Ils sont souvent très nombreux, et se suivent à quelques centimètres l'un de l'autre. On imagine facilement la rapidité de la désagrégation mécanique dans de telles roches.

CONT

La schistosité correspond aux structures se développant selon le plan S d'aplatissement. [...] on appelle schistosité uniquement les structures planaires développées selon ce plan d'aplatissement (plan S).

OBS

Dans la plupart des roches mécaniquement déformées apparaissent des systèmes remarquables de plans et de directions parallèles. La présence de plans confère aux masses rocheuses une schistosité aussi appelée foliation.

OBS

Par opposition à une «surface de schistosité» ou «surface de foliation» qui peut être ondulée, un «plan de schistosité» ou «plan de foliation» s'applique plus spécifiquement à une surface plane.

Spanish

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Record 2 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 2

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