Science. 1970 Aug 21;169(3947):760-1. doi: 10.1126/science.169.3947.760.
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.
最近在科尤库克山谷发现的黑曜石矿床可能就是在阿拉斯加西北部考古遗址中发现的长期寻找的黑曜石来源。这些矿床的黑曜石在物理特性和钠-锰比值方面与考古黑曜石相媲美,有证据表明这些矿床在过去曾被“开采”过。