Bedrock geologic map of the Eagle A-1 Quadrangle, Fortymile mining district

Geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted field investigations and geochemical rock sampling during the 1999, 2000,...来自阿拉斯加地质与地球物理调查局（Alaska Division of Geological & Geophysical Surveys, DGGS）的地质学家于1999年、2000年……期间开展了野外调查与岩石地球化学采样工作。