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Obsidian is an igneous rock. However it differs from other rocks because it contains no minerals. It consists of natural glass, which is not a mineral because it has no crystal structure.

Answers from McDougal Littell, Earth Science book

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11y ago
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6y ago

Obsidian is classified as igneous rock, solidified from molten material.

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12y ago

An obsidian rock is an extrusive igneous rock that forms when a volcano erupts and has no time to crystallize, so it has a glassy texture. Obsidian rocks are generally black in color.

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11y ago

most obsidians have a felsic chemistry. Felsic igneous rocks are light-colored

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13y ago

Obsidian is an extrusive felsic volcanic glass.

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Q: What kind of igneous rock is obsidian?
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Related questions

What kind or rock is obsidian?

It is an igneous rock


Is obsidian metamorphic igneous or sedimentary?

Obsidian is an igneous rock.


What kind of igneous rock does not have fossils?

obsidian


Is obsidian an igneous rock?

Obsidian is an igneous rock.So the answer is YES.


What igneous rock has no visible crystals?

Granite is a coarse grained igneous rock without Pyroxene.


What does rock group does obsidian belong to?

Obsidian is in the Igneous rock group.


What is the obsidian rock type?

Obsidian is an extrusive felsic igneous rock.


What kind of rock is formed after a volcano erupts?

Extrusive igneous rock such as basalt, rhyolite, pumice, and obsidian.


Dark igneous rock formed from lava?

obsidian obsidian


What group does obsidian belong to?

Obsidian is in the Igneous rock group.


Which rock is igneous and is black?

obsidian rock


How was the rock obsidian made?

Obsidian is a volcanic or igneous rock. It is formed when lava dries up.