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SUBSIDENCE CHAUDRON [3 records]

Record 1 2011-02-22

English

Subject field(s)
  • Vulcanology and Seismology
  • Geomorphology and Geomorphogeny
DEF

A structure formed by the lowering along a steep ring fracture of a more or less cylindrical block, usually 1 to 10 miles (1.6 to 16 kilometers) in diameter, into a magma chamber.

OBS

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

French

Domaine(s)
  • Volcanologie et sismologie
  • Géomorphologie et géomorphogénie
DEF

Structure résultant de l'effondrement d'un bloc plus ou moins circulaire dans une chambre magmatique.

OBS

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

Spanish

Save record 1

Record 2 2011-02-22

English

Subject field(s)
  • Vulcanology and Seismology
  • Geomorphology and Geomorphogeny
DEF

The process in which a more or less cylindrical block of rock above a magma chamber collapses into the space left as the magma moves toward the surface.

CONT

Cauldron subsidence is where a large amount of magma leaves the top of the magma chamber unstable, causing it to collapse inwards ...

OBS

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

French

Domaine(s)
  • Volcanologie et sismologie
  • Géomorphologie et géomorphogénie
CONT

Ces granites présentent souvent des caractères communs : (1) des rhyolites extrusives; (2) des ring dykes et cone-sheet de porphyres quartzeux postérieurs aux rhyolites, indiquant une subsidence en chaudron; (3) des granites à riebéckite-biotite finissant par une bordure de granite à albite.

OBS

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

PHR

Mise en place par subsidence en chaudron.

Spanish

Save record 2

Record 3 2009-02-13

English

Subject field(s)
  • Geomorphology and Geomorphogeny
  • Vulcanology and Seismology
CONT

Basalt volcanic centers in the southern Great Basin are most common in: (1) ring-fracture zones of cauldron complexes; (2) rift grabens that cut cauldron complexes; and (3) rift grabens outside volcanic source areas.

CONT

The rhyolites, which were previously mapped as Eocene, are reinterpreted to be part of a previously unrecognized mid-Cretaceous cauldron subsidence complex.

OBS

cauldron complex; cauldron subsidence complex: terms used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • caldron subsidence complex

French

Domaine(s)
  • Géomorphologie et géomorphogénie
  • Volcanologie et sismologie
CONT

Les rhyolites, antérieurement cartographiées comme datant de l'Éocène, sont réinterprétées comme faisant partie d'un complexe de cuvettes d'effondrement auparavant non reconnues et qui dateraient du Crétacé moyen.

OBS

complexe formé par subsidence en chaudron : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 3

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