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How Did Obsidian Form? [Solved]
Obsidian is an igneous rock occurring as a natural glass that is formed by the rapid cooling of viscous lava from volcanoes.12 Sept 2022
All about Obsidian rocks
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How does Obsidian Form? with Steve Bennett
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Obsidian WhatI It Is And How It Forms - An Explanation By Christina Rose
Obsidian
