trachyte - vertaling naar frans
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trachyte - vertaling naar frans

VOLCANIC IGNEOUS ROCKS MADE OF ALKALI FELDSPAR PHENOCRYSTS AND GROUND MASS OF GLASS AND MICROLITES OF THE SAME INGREDIENTS, DEEP EQUIVALENT: SYENITE.
Trachytic; Trachyte texture; Trachite; Trachytes; Trachydacite

trachyte         
n. trachyte, a light-colored igneous rock consisting essentially of alkali feldspar

Definitie

trachyte
['tre?k??t, 'trak??t]
¦ noun Geology a grey fine-grained volcanic rock consisting largely of alkali feldspar.
Origin
C19 (orig. denoting a volcanic rock with a gritty surface): from Gk trakhus 'rough' or trakhutes 'roughness'.

Wikipedia

Trachyte

Trachyte () is an extrusive igneous rock composed mostly of alkali feldspar. It is usually light-colored and aphanitic (fine-grained), with minor amounts of mafic minerals, and is formed by the rapid cooling of lava enriched with silica and alkali metals. It is the volcanic equivalent of syenite.

Trachyte is common wherever alkali magma is erupted, including in late stages of ocean island volcanism and in continental rift valleys, above mantle plumes, and in areas of back-arc extension. Trachyte has also been found in Gale crater on Mars.

Trachyte has been used as decorative building stone and was extensively used as dimension stone in the Roman Empire and the Republic of Venice.