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TROCTOLITE [1 record]

Record 1 2005-03-23

English

Subject field(s)
  • Petrography
DEF

A gabbro that is composed chiefly of calcic plagioclase (e.g. labradorite) and olivine with little or no pyroxene.

CONT

The high-Al chromitites of the Camaguey district of Cuba are associated with troctolites.

OBS

Such rocks commonly are speckled like trout, hence the ... synonyms derived from Greek, German, and English.

OBS

forellenstein: German for troutstone ... alluding to speckled trout-skin appearance ...

French

Domaine(s)
  • Pétrographie
DEF

Variété de gabbro à pyroxène rare et olivine abondante, plus ou moins serpentinisée.

CONT

Les chromitites riches en Al du district de Camaguey, à Cuba, sont associées à des troctolites.

OBS

Lorsque l'olivine est serpentinisée, la roche est parsemée de petites taches noires. Elle a alors le faciès «truité».

Spanish

Campo(s) temático(s)
  • Petrografía
DEF

Variedad de gabro rico en olivino y en magnetita; estos minerales forman manchitas negruzcas y rojizas que evocan las de la piel de la trucha.

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