Keywords: Bonanza mine Geologic Column.PNG en Bonanza mine geologic column 1911-01-01 USGS Bulletin 448 F H Moffit and S R Capps other versions PD-USGov Kennecott Alaska Copper mines Mining in Alaska Copper mining in the United States Geology of Alaska Rock glaciers Stratigraphic columns of Alaska Stratigraphic columns of the United States |