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UNALTERED ROCK [1 record]

Record 1 2009-05-01

English

Subject field(s)
  • Petrography
DEF

A rock ... that has not been subjected to or altered by surface weathering, such as a rock newly exposed by fracturing.

CONT

... phosphate is recovered from fresh rock rather than from a weathered residuum ...

OBS

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

French

Domaine(s)
  • Pétrographie
CONT

[...] tout ce qui contribue à imbiber la roche augmente son altération. Ce sera le cas [...] quand la roche présente une certaine perméabilité, par la présence de fissures ou de cavités. Celles-ci sont fréquentes dans les roches fraîches, même si la structure n'est pas vacuolaire [...]

CONT

Les processus chimiques et biologiques qui conduisent de la roche saine à ses produits de décomposition sont appelés altération.

OBS

Par opposition à «roche altérée».

OBS

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

Spanish

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