点击下载:吉林大学:《地球科学概论》(英文版) Chapter 4: Igneous rocks: Product of Earth's Internal Fire
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Glassy rock, Obsidian from the Jemez mountainsGlassy Rock, Obsidian from the Jemez Mountains
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点击下载:吉林大学:《地球科学概论》(英文版) Chapter 4: Igneous rocks: Product of Earth's Internal Fire
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