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![Obsidian - Wikipedia, the free encyclopedia](https://www.iarticlesnet.com/pub/img/site/s_15.jpeg)
Obsidian - Wikipedia, the free encyclopedia
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日期:2024-08-15
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. Obsidian is commonly found within the margins of rhyolitic lava flows ...看更多