Indo-Pacific Islands

North American Obsidian

Obsidian, natural glass formed during volcanic eruptions, was an important raw material in prehistory worldwide.  Obsidian was prized for tool making for a number of reasons, including its workability, sharpness, and visual appeal.  Consequently, prehistoric peoples went to great lengths to obtain obsidian, often from very distant sources.  For archaeologists, obsidian is a powerful tool for understanding prehistoric economy and interaction, because individual obsidian outcrops are usually spatially discrete and chemically distinct from one another.  During the 1960s, ar

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