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Which characteristic provides the best evidence that obsidian rock formed in an extrusive environment?

Anonymous

∙ 13y ago

Updated: 6/14/2024

noncrystalline glassy texture

Wiki User

∙ 13y ago

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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.

Related Questions

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

What is a glassy grained extrusive rock?

Obsidian.

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 the obsidian rock type?

Obsidian is an extrusive felsic igneous rock.

What is a glassy fine-graind extrusive rock?

obsidian

Is obsidian a intrusive or extrusive rock?

it is A instrsive! lol

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.

Which rock am igneous extrusive black?

Basalt, pumice, and obsidian are all extrusive igneous rocks which can appear as black rock.

What are some names of extrusive igneous rocks?

== == Rhyolite, basalt, pumice, obsidian, andesite, dacite, tuff, welded tuff, scoria.

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