Summary of Glimpce Geophysical Investigations of the Midcontinent Rift System in the Lake Superior Region

Abstract

The Great Lakes International Multidisciplinary Program on Crustal Evolution (GLIMPCE) was jointly sponsored by the U.S. Geological Survey and the Geological Survey of Canada, and engaged participants from a broad spectrum of government and academic institutions in both the U.S. and Canada. Activities in the Lake Superior region included seismic reflection and refraction surveys conducted in 1986 and aeromagnetic surveys in 1987. These surveys provided new information on the character of the Midcontinent Rift System around and beneath Lake Superior.