Can Be Volcanic Glass
mobizim.com -Can Be Volcanic Glass Volcanic glass can refer to the interstitial, or matrix, material in an aphanitic (fine grained) volcanic rock or can refer to any of several types of vitreous igneous rocks. Most commonly, it refers to obsidian , a rhyolitic glass with high silica (SiO 2 ) content.
Can Be Volcanic Glass operties. Granites and rhyolites can form from the same magma as obsidian and are often geographically associated with the obsidian. Rarely, volcanic glasses are found with a composition similar to basalt and gabbro .
What is volcanic glass? (with pictures. Volcanic glass is that which is naturally formed when high viscosity molten lava cools. The glass is created because this lava contains less water and more crystal material. Its chemical composition is similar to that of granite, which is composed of alkali feldspar and quartz. The materials in the
Volcanoes and volcanic glass. By Andy Darnley. A mountain with a center of hot magma is called a volcano. Under the right circumstances, volcanoes erupt and release a flow of lava.
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