Reports

A Possible Bedrock Source for Obsidian Found in Archeological Sites in Northwestern Alaska

See allHide authors and affiliations

Science  21 Aug 1970:
Vol. 169, Issue 3947, pp. 760-761
DOI: 10.1126/science.169.3947.760

Abstract

Recently discovered deposits of obsidian in the Koyukuk valley may be the long-sought-for source of obsidian found in archeological sites in northwestern Alaska. Obsidian from these deposits compares favorably in physical characteristics and sodium-manganese ratio with the archeological obsidian, and there is evidence that the deposits have been "mined" in the past.