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ARGILE SCHISTOFERRUGINEUSE [1 record]

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Alphabetical list of terms

Record 1 2006-05-18

English

Subject field(s)
  • Petrography
  • Iron and Manganese Mining
DEF

A soft, incompetent, fine-grained mass of quartz, pyrolusite, and kaolin with subangular fragments of chert, hematite, and goethite.

CONT

Leached slate beds vary from white to pink or deep red and are known as "paint rock". The intimate intergrowths of iron oxide and aluminous clay or silica make these ores difficult to beneficiate.

French

Domaine(s)
  • Pétrographie
  • Mines de fer et de manganèse
CONT

Quand la silice, le calcium, le magnésium et le fer sont lessivés des shales et ardoises noirs à grain fin, les couches et le rubanement primaires ressortent du minerai rouge sous forme de tendres couches saprolitiques semi-indurées à argiles alumineuses qui ne contiennent aucune quantité appréciable de fer. Ces couches d'ardoise lessivée sont appelées «ocre de fer» et leur couleur varie de blanc à rose ou rouge foncé.

Spanish

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