Obsidian is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. It is commonly found within the margins of rhyolitic lava flows known as obsidian flows. These flows have a high content of silica, giving them a high viscosity. The high viscosity inhibits diffusion of atoms through
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Obsidian is a naturally occurring volcanic glass formed when lava e…
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LEARN ABOUT OBSIDIAN 🖤 Obsidian is an igneous rock consisting mainly of silicon dioxide, which occurs as a natural glass. It is formed during the eruption of Felsic lava from volcanoes. Because of the high concentration of silica within Felsic lava, the high viscosity coupled with the rapid cooling upon it’s expulsion from the earth inhibits the formation of mineral crystals, allowing instead for a natural glass to form from the lava. The structures that we find within crystalline forms simply
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Ancient obsidian mirrors reveal Neolithic ritual practices, not just reflections. #ancienthistory #archaeology #didyouknow #historyfacts | The Viral World
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Obsidian, a volcanic glass, has been highly prized in the world of stone tools for thousands of years. Formed when lava cools rapidly, obsidian's unique composition and high silica content makes it incredibly sharp and relatively durable, perfect for crafting blades, arrowheads, and other essential tools. From ancient times, obsidian has been valued for its beauty and functionality, with many cultures relying on it for survival. Today, we can admire the determination of our ancestors, who harnes
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