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Volcanic glass is material produced by a volcano that lacks any sort of crystalline structure. While most rocks contain crystals in some form of another, glass does not. Volcanic glass usually forms when molten rock cools too quickly to form a crystalline structure. Examples of volcanic glass include obsidian, ash, pumice, and scoria.
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Is volcanic glass an intrusive or extrusive igneous rock?
Volcanic glass is an extrusive igneous rock. It forms when molten lava cools quickly on the Earth's surface, preventing the formation of crystals.
Is the glass house mountains a volcano?
Yes, the Glass House Mountains in Australia are volcanic plugs formed by volcanic activity millions of years ago. However, they are not active volcanoes today.
How is volcanic glass different from a mineral?
Volcanic glass does not technically contain mineral crystals. The definition of a mineral requires a crystalline structure. Secondly, the chemical composition of volcanic glass could vary widely. Minerals have definite parameters for chemical composition.
What is the nickname of obsidian rock?
'Volcanic glass' is the common name, for it is glassy, and comes from a volcano. Of use in anthropology, for such an excellent cutting tool has good trade value.
Is volcanic glass a mineral group?
No, volcanic glass is not a mineral group. It is a type of igneous rock formed from the rapid cooling of lava without the time for crystallization to occur, resulting in an amorphous (non-crystalline) structure.
What is sometimes known as volcanic glass?
Obsidian is a glass of volcanic origin.
What type of rock is volcanic glass?
Siliceous volcanic glass is also known as obsidian.
Are the atoms in volcanic glass organized or disorganized?
The atoms in volcanic glass are highly disorganized.
Is volcanic glass a mineral?
Volcanic glass is not a mineral. It's composition is complex, and their is no crystalline structure.
What is true about volcanic glass?
Volcanic glass is the amorphous (uncrystallized) product of rapidly cooling magma.
What is the common name for obsidian rock?
The common name for obsidian rock is volcanic glass.
Is volcanic glass full of air spaces?
Not necessarily. Scoria and pumice are forms of volcanic glass that contain air spaces, while obsidian, another volcanic glass, contains minimal air spaces if any.
Is volcanic glass a Granite?
No. Granite cools from magma deep underground. Volcanic glass cools quickly at or near the surface.
What is the name of the dense volcanic glass that is typically black in color?
The name of the dense volcanic glass that is typically black in color is obsidian.
Is volcanic glass an intrusive or extrusive igneous rock?
Volcanic glass is an extrusive igneous rock. It forms when molten lava cools quickly on the Earth's surface, preventing the formation of crystals.
What is a mixture of volcanic glass and organic matter?
A rock.
Name given to dark volcanic glass?
Obsidian.
