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Is obsidian an instrusive or extrusive igneous rock how do you know?
Obsidian is an extrusive rock and is formed from rapidly cooling magma. Obsidian is also known as volcanic glass and one can find only sub-microscopic crystals in it. This is because it was cooled too fastly for large crystals to form. If the material that obsidian consists of were an intrusive rock and had a lot of time to cool down, one would find that it would be composed of easily visible crystals.
What is a glassy fine-graind extrusive rock?
obsidian
Is obsidian intrusive or extrusive rock?
Obsidian is intrusive because it was cooled below the ground.
What are some names of extrusive igneous rocks?
== == Rhyolite, basalt, pumice, obsidian, andesite, dacite, tuff, welded tuff, scoria.
Is obsidian a metamorphic rock?
Obsidian is an igneous rock.So the answer is YES.
What characteristic provides the best evidence that obsidian rock formed in an extructive environment?
The characteristic that provides the best evidence that obsidian rock formed in an extrusive environment is its glassy texture. This texture indicates rapid cooling of molten lava, preventing the formation of large crystals. Additionally, the presence of gas bubbles or vesicles can further suggest that the lava cooled quickly upon exposure to the surface environment.
Is obsidian extrusive rock?
No. Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.
Is Obsidian an extrusive rock or intrusive rock?
Yes it is extrusive love yall
Where is Obsidian?
Obsidian is a naturally occurring glass formed as an extrusive igneous rock
Is obsidian an instrusive or extrusive igneous rock how do you know?
Obsidian is an extrusive rock and is formed from rapidly cooling magma. Obsidian is also known as volcanic glass and one can find only sub-microscopic crystals in it. This is because it was cooled too fastly for large crystals to form. If the material that obsidian consists of were an intrusive rock and had a lot of time to cool down, one would find that it would be composed of easily visible crystals.
What is a glassy grained extrusive rock?
Obsidian.
What is the obsidian rock type?
Obsidian is an extrusive felsic igneous rock.
Is obsidian a intrusive or extrusive rock?
it is A instrsive! lol
What is a glassy fine-graind extrusive rock?
obsidian
Is obsidian intrusive or extrusive rock?
Obsidian is intrusive because it was cooled below the ground.
Is obsidian a intrusive or extrusive igneous rock?
Andesite is considered an extrusive igneous rock.
Do obsidian rock cool quickly?
Yes, obsidian rock cools quickly. It is formed from lava that cools rapidly upon exposure to air or water, preventing the formation of crystal structures. This rapid cooling results in its glassy texture and characteristic smooth surface. As a result, obsidian is considered an extrusive igneous rock.
