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SURFACE SCHISTOSITE [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 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

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