The Aztec tecpatl was a sacred obsidian blade used for everything from high-stakes rituals to warfare. #history #ancienthistory #archaeology | Ancient Blog

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Obsidian: It’s not just a valuable commodity in Minecraft. Obsidian was an important resource for Indigenous peoples across western North America and this month’s YVO update comes to you from one of its most important archeological sites. We are at Obsidian Cliff, in the north part of Yellowstone National Park. Obsidian forms when high-silica rhyolite lava comes out of the ground and quenches (cools quickly). It forms a glass, that when it fractures, makes a very sharp surface. Obsidian is great