What type of glassy rock is found in a volcano?
http://en.wikipedia.org/wiki/Obsidian
The type of glassy rock that is commonly found in a volcano is known as obsidian. It is a type of volcanic glass that forms when molten lava cools rapidly without crystallizing. Obsidian is typically black and has a shiny, glass-like appearance. It is composed mainly of silica, which gives it its glassy texture.
To find the answer to this question, you can start by understanding the general characteristics of volcanic rocks. Volcanic rocks are formed from molten lava or magma that erupts from a volcano. They can be classified into several categories based on their composition and texture.
One of the categories of volcanic rocks is glassy or vitreous rocks, which include obsidian. To further confirm that obsidian is the specific type of glassy rock found in volcanoes, you can cross-reference this information with reliable sources such as geology textbooks, scientific articles, or reputable websites. These sources will provide you with detailed and accurate information about the different types of rocks and their occurrence in volcanic areas.