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FOUNDER BRECCIA [1 record]

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Record 1 2010-04-14

English

Subject field(s)
  • Petrography
  • Erosion and Weathering (Geol.)
DEF

A mass of angular fragments formed by the collapse of rock overlying an opening, as by foundering of the roof of a cave or of the country rock above an intrusion ...

CONT

Some [breccias] appear to be the result of hydrothermal activity - fluidized breccias with rounded clasts and rock flour cements - whilst others appear to be angular collapse breccias.

OBS

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

French

Domaine(s)
  • Pétrographie
  • Érosion et corrosion (Géologie)
CONT

[...] la «subsidence d'oxydation» [...] se manifeste par des fissures [...]. Parfois cette subsidence se manifeste par des entonnoirs avec de véritables brèches d'effondrement; cas fréquent dans les roches carbonatées dont la karstification est accélérée par les solutions acides à proximité du dépôt.

OBS

brèche d'effondrement : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

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