Seismic interpretation of the 1.1 Ga Midcontinent Rift volcanic interval beneath Lake SuperiorMay 8, 2017·Morgan D. Sanger,E. Kingsbury Stewart,V. J. S. Grauch· 0 min read Cite PDFLast updated on May 8, 2017← Revisiting geophysical interpretations of the Midcontinent Rift below Lake Superior May 8, 2017