Obsidian is an extrusive igneous rock. Where was this rock most likely formed? in an ancient ocean on the surface of a volcano deep inside a volcano on a river bed

Obsidian is an extrusive igneous rock. Where was this rock most likely formed?

in an ancient ocean
on the surface of a volcano
deep inside a volcano
on a river bed

1 Answer

Obsidian is an extrusive igneous rock. Where was this rock most likely formed? in an ancient ocean on the surface of a volcano deep inside a volcano on a river bed

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