Concept information
Término preferido
andesite
Definición
- Andesite is an extrusive volcanic rock of intermediate composition. In a general sense, it is the intermediate type between basalt and rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predominantly of sodium-rich plagioclase plus pyroxene or hornblende. Andesite is the extrusive equivalent of plutonic diorite. Characteristic of subduction zones, andesite represents the dominant rock type in island arcs. The average composition of the continental crust is andesitic. Along with basalts, they are a major component of the Martian crust. (Adapted from: https://en.wikipedia.org/wiki/Andesite)
Concepto genérico
En otras lenguas
-
francés
URI
http://data.loterre.fr/ark:/67375/QX8-G8R9BDGN-H
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