0
What is the name given to the volcanic glass that forms due to very rapid cooling of magma?
Wiki User
∙ 11y ago
Yes obsidian is glassy because it cooled very fast.
Wiki User
∙ 13y ago
Wiki User
∙ 10y agoNot necessarily. Volcanic glass forms from lava that has cooled very quickly. Although this can occur due to contact with water, it also occurs with cooling on contact with air.
Wiki User
∙ 11y agoa natural glass rock formed when lava cools very fast
Wiki User
∙ 13y agoExtrusive (volcanic) igneous rock.
Wiki User
∙ 11y agoobsidian
Add your answer:
Earn +20 pts
What is volcanic glass?
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.
What is a extrusive rock that is actually glass?
Obsidian is an extrusive rock that is a naturally occurring volcanic glass. It occurs when lava extrudes from a quickly cooling volcano, causing little crystal growth.
How is obsidian formed and what type of rocks is it?
It is a usually black or banded, hard volcanic glass that displays shiny, curved surfaces when fractured and is formed by very rapid cooling of lava. The curved fracture surfaces are more correctly termed conchoidal fractures and the "glass" is said to have a "vitreous" texture as the material cools so rapidly that crystals do not have time to form.
What igneous rock has no visible crystals as a result of rapid cooling?
Obsidian rocks are cooled very fast, and you cannot see the crystals in them.
Is volcanic glass an intrusive or extrusive igneous rock?
Volcanic material is extrusive.
What is true about volcanic glass?
Volcanic glass is the amorphous (uncrystallized) product of rapidly cooling magma.
Name given to dark volcanic glass?
Obsidian.
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.
What is considered to be volcanic glass?
Obsidian, due to its glassy texture made from the super-cooling process.
Extremely rapid cooling lavA in which no crystals form?
the reterded mineral
Smooth glassy rock that is formed when lava cools?
Obsidian
What is possible origin of obsidian?
Obsidian is volcanic glass, derived from the quick cooling of high silica lava.
What does obsidian feel like?
Well, it feels like glass. It is a volcanic rock that forms after quick cooling that takes on a crystalline structure that would feel like glass. It could be rough in other places, like any other crystal, but it will be fairly smooth.
What is volcanic glass?
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.
Can lava make glass?
Volcanic glass forms when molten material cools too quickly for crystals to form. The small size of volcanic ash particles ensures that the cool quickly.
How does obisidian form?
Obsidian is actually volcanic glass that forms when lava cools without crystalizing.
How old is the oldest known piece of glass?
Volcanic glass (obsidian's) has been around since the earliest existence of the cooling Earth. Man made glass however can be traced back to 3500 BCE in Mesopotamia.
