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Par Collection Par Auteur Par Date Par Sujet Par Titre
  • HOLE, F. D.
  • 1985
  • The conditions of reef initiation over the Mio-Pliocene volcanic substrate are discussed. Drill holes 1000 m deep have revealed six carbonate layers intercalated with volcanic material, giving evidence not only of subsidence movements, but also
  • 1985
  • About 100 natural wells or sink-holes (93 from 1955 to 1983) are known in the Tournais area. They are due to deep karst dissolution. Areas favourable to natural wells include the infiltration area of the Carboniferous Limestone groundwater
  • 1985