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FERRALLITE [1 record]

Record 1 2011-12-16

English

Subject field(s)
  • Soil Science
  • Soil Mechanics (Engineering)
DEF

... a soil that originated from basic crystalline rocks which have undergone chemical change and that consist of a mixture of hydrates of iron, aluminum and sometimes manganese and titanium.

OBS

A term used in the formerly French parts of North Africa ...

French

Domaine(s)
  • Science du sol
  • Mécanique des sols
DEF

Sol issu de roches basiques cristallines, d'épaisseur moindre que le sol ferrallitique et pauvre en kaolinite néoformée, mais riche en hydroxydes de fer et d'aluminium.

CONT

[...] le [...] phénomène d'altération pédogénétique, dit latéritique, laisse comme phase résiduelle [...] des hydroxydes d'alumine [...] et des hydroxydes et oxydes de fer [...] [On utilise le terme] «ferrallite» pour ces formations mixtes.

Spanish

Campo(s) temático(s)
  • Ciencia del suelo
  • Mecánica del suelo
DEF

Suelo bien drenado, originado a partir de rocas ígneas básicas, constituido principalmente por óxidos hidratados de hierro y aluminio, con bajo contenido de sílice.

CONT

En las regiones ecuatoriales y húmedas, el agua tibia y algo ácida altera los feldespatos y libera la alúmina y los óxidos de hierro, que permanecen en la capa superficial, en tanto que la sílice y los óxidos alcalinos son arrastrados por las aguas infiltradas. Se forma así una tierra roja, suelta y fértil, la ferralita.

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