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Is obsidian extrusive rock

Updated: 8/29/2023

Wiki User

∙ 12y ago

Best Answer

No.

Obsidian is volcanic glass. Glass is amorphous and thus noncrystalline.

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∙ 8y ago

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Q: Is obsidian extrusive rock

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What trait is an intrusive igneous rock?

If a rock is intrusive, that means that it formed from magma inside the Earth. An example is granite. The opposite is extrusive, which forms from cooling lava from volcanoes. An extrusive rock is obsidian.

Is obsidian rock metamorphic rock sedimentary or igneous?

Obsidian is an extrusive igneous rock, formed from rapidly cooling lava.

What is category of igneous extrusive rock?

Some igneous extrusive rocks include obsidian, basalt, andesite, rhyolite, scoria, pumice, basaltic glass. If you want more, go to page 6 on the Earth Science Reference Tables at the related link.

Is obsidian a sedimentary rock igneous rock or a metamorphic rock?

obsidian is an igneous rock, it is not formed from sediment, or a rock going under heat and pressure for the second time it is formed when a volcano erupts and it cools very quickly giving it a smooth glossy surface like glass.

What is dark glassy volcanic rock called?

obsidian

Is Obsidian an extrusive rock or intrusive rock?

Yes it is extrusive love yall

What is a glassy grained extrusive rock?

Obsidian.

What is the obsidian rock type?

Obsidian is an extrusive felsic igneous rock.

Where is Obsidian?

Obsidian is a naturally occurring glass formed as an extrusive igneous rock

A glassy fine grained extrusive rock?

Obsidian

What is a glassy fine-graind extrusive rock?

obsidian

Is obsidian a intrusive or extrusive rock?

it is A instrsive! lol

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 type of extrusive rock can be easily mistaken for glass?

Obsidian

Is obsidian intrusive or extrusive rock?

Obsidian is intrusive because it was cooled below the ground.

How is granite different from scoria pumice and obsidian?

granite is extrusive rock

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