Oligoclase from Keweenaw Peninsula, Michigan, USA
USA | |
| Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp. |
Chaudhuri,S.,and Faure,G.,(1967) Geochronology of the Keweenawan Rocks,White Pine,Michigan:Economic Geology,v.62,p.1011-1033 |