Suche

Deutsche Rhyodazit {m} [min.] Synonyme

Englische rhyodacite Synonyme

rhyodacite Definition

rhyodacite Bedeutung

Ergebnisse der Bewertung:
106 Bewertungen 5

 

Einfach einen Begriff in der Tabelle rechts anklicken um weitere Übersetzungen in dieser Sidebar zu erhalten.

Rhyodacite is an extrusive volcanic rock intermediate in composition between dacite and rhyolite. It is the extrusive equivalent of granodiorite. Phenocrysts of sodium-rich plagioclase, sanidine, quartz, and biotite or hornblende are typically set in an aphanitic to glassy light to intermediate-colored matrix. Rhyodacite is a high silica rock containing 20% to 60% quartz with the remaining constituents being mostly feldspar. The feldspar is a mix of alkaline feldspar and plagioclase, with plagioclase forming 35% to 65% of the mix. Rhyodacite often exists as explosive pyroclastic volcanic deposits.