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Dacite
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- Volcanic rock (or lava) that characteristically is light in color and contains 62 to 69 percent silica and moderate amounts of sodium and potassium.
- Medium-coloured, very fine-grained, acid igneous rock. the
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Дацит, русский
- , эффузивная кислая горная порода, состоящая из тонкозернистой или стекловатой основной массы и вкрапленников плагиоклаза, кварца, роговой обманки и др. структура порфировая или афировая. плотность 2650 кг/м3. строительный материал.
- Эффузивная порода, состоящая из полевого шпата, кварца, роговой обманки и других минералов.
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Characteristical, английский
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Rhyolite, английский
- Volcanic rock (or lava) that characteristically is light in color, contains 69 percent silica or more, and is rich in potassium and sodium. it is fine grained, which although different in texture, has the same composition as granite
- Medium-coloured, fine-grained, acid igneous rock. the very
Ashfall (subaerial), английский
Volcanic ash that has fallen through the air. the resulting deposit is usually well sorted and exhibits a finely layered structure.
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