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CALCAIRE FERREUX [2 records]
Record 1 - internal organization data 1993-01-12
Record 1, English
Record 1, Subject field(s)
- Geology
Record 1, Main entry term, English
- karst bauxite
1, record 1, English, karst%20bauxite
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
Karst bauxites ... include the oldest known bauxites ... These bauxites overlie a highly irregular karstified limestone or dolomite surface. Texturally karst bauxites are quite variable. The West Indian examples are gibbsitic ores with a structureless earthy, sparsely concretionary texture. European karst bauxites, on the other hand, are generally lithified and texturally pisolitic, oolitic, fragmental or even bedded. Mineralogically they are boehmitic ores. 1, record 1, English, - karst%20bauxite
Record 1, French
Record 1, Domaine(s)
- Géologie
Record 1, Main entry term, French
- bauxite karstique
1, record 1, French, bauxite%20karstique
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Dépôt argileux, de teinte rougeâtre, qui enrobe la surface karstifiée d’une masse calcaire; le kaolin et la montmorillonite en sont les principaux éléments avec des oxydes ferreux. Ces dépôts proviendraient pour les uns des résidus de la décalcification, pour d’autres ils auraient été apportés en solution par les eaux d’infiltration, les cavités karstiques jouant le rôle de piège; pour d’autres enfin la bauxite s’accroîtrait d’elle-même en favorisant sous elle l'acidification des eaux d’infiltration, provoquant ainsi la formation de dolines. On lui a donné parfois une origine éolienne. 2, record 1, French, - bauxite%20karstique
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 1991-12-16
Record 2, English
Record 2, Subject field(s)
- Geology
- Ashlar and Building Stone (Quarrying)
Record 2, Main entry term, English
- grindstone 1, record 2, English, grindstone
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record 2, French
Record 2, Domaine(s)
- Géologie
- Pierres de taille et moellons (Carrières)
Record 2, Main entry term, French
- calcaire ferreux
1, record 2, French, calcaire%20ferreux
masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 OBS
Cette pierre calcaire contient du minerai de fer en quantités variables. Lorsque la teneur en fer est elevée, on l’appelle sidérite. (Énergie, Mines et Ressources, 14 novembre 1968). 1, record 2, French, - calcaire%20ferreux
Record 2, Spanish
Record 2, Textual support, Spanish
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