![Archean and Proterozoic tectono-magmatic activity along the southern margin of the Superior Province in northwestern Iowa, United States]()
Archean and Proterozoic tectono-magmatic activity along the southern margin of the Superior Province in northwestern Iowa, United StatesWindom, Kenneth E.; Schmus, W. Randall Van; Seifert, Karl E.; Wallin, E. Timothy; Anderson, Raymond R. · Canadian Journal of Earth Sciences · 1993