New research uncovers how obsidian artifacts reveal the vast trade networks of the Aztec Empire during Tenochtitlan’s early ...

Researchers analyzed 788 obsidian artifacts from Tenochtitlan, revealing that the Mexica (Aztec) Empire sourced this important material from at least eight different locations, including regions ...

Obsidian is an example of an extrusive igneous ... All these different sedimentary rocks are formed from the broken remains of other rocks that become joined together. 1 Sediment transport ...

Hand-carved arrowheads and jagged spears made of obsidian, a sharp rock formed by volcanic magma ... in Wyoming's Yellowstone National Park. Other sources include the Anahim Peak and Mount ...