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ORBICULAR DIORITE [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2015-12-01

English

Subject field(s)
  • Petrography
DEF

... an extremely rare variety of the rock that contains many spherical lumps, or orbs, that exhibit concentric zones of light and dark color.

French

Domaine(s)
  • Pétrographie
DEF

Roche à grains fins, à orbicules centimétriques zonées (blanc et vert) et fibroradiées, formées de plagioclases et d'amphiboles provenant de l'altération des pyroxènes.

Spanish

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