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LOPOLITH [1 record]

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Alphabetical list of terms

Record 1 2012-10-15

English

Subject field(s)
  • Petrography
DEF

A large, concordant, typically layered igneous intrusion, of phano-convex or lenticular shape, that is sunken in its central part owing to sagging of the underlying country rock.

OBS

Lopoliths are to the basic rocks what batholiths are to the granites.

French

Domaine(s)
  • Pétrographie
DEF

[...] laccolite de grandes dimensions (celui de Sudbury a 50 km X 25 km) dont la partie centrale est affaissée en synclinal [...]

CONT

Le lopolite est [...] beaucoup plus étendu que le laccolite et présente généralement une différenciation verticale : roches basiques et minerais à la partie inférieure, granites à la partie supérieure.

CONT

[...] on connaît [...] des intrusions magmatiques beaucoup plus étendues [que les laccolites] : ce sont les lopolites, d'aspect tabulaire, dont le toit, au lieu d'être bombé, a tendance à être déprimé comme s'il avait fléchi.

CONT

[...] lopolite de grande dimension à forme de lentille biconcave.

Spanish

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