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CHALK MARL [1 record]

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Alphabetical list of terms

Record 1 1998-07-16

English

Subject field(s)
  • Geology
DEF

A grayish marly rock rich in chalk and containing up to 30% clayey material;...

CONT

The location of the tunnels 40 m under the sea bed makes use of geological strata which are favourable for the tunnelling operations. The UK drives are mostly in fairly impermeable chalk marl. Their TBM's (Tunnel Boring Machine) are open face.

French

Domaine(s)
  • Géologie
CONT

[...] la couche de craie bleue descend sous la côte, et les tunnels se trouvent dans des couches géologiques très perméables.

Spanish

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