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Keweenawan volcanic rocks of Michipicoten Island, Lake Superior, Ontario
R. N. Annells · Dept. of Energy, Mines and Resources
141 sayfa · 1973
Stratigraphic Geology / Volcanic ashes, tuff / Volcanic ash, tuff
Proterozoic flood basalts of eastern Lake Superior
R. N. Annells · Dept. of Energy, Mines and Resources
51 sayfa · 1973
Flood basalts / Stratigraphic Geology / Volcanism