00000nam 2200000za 4500 9.833538 CaOODSP 20251031142447 cr ||||||||||| 170308s1990 oncbd o f000 0 eng d CaOODSP eng eng fre n-cn-on nl----- M183-2/2283E-PDF 1986 Great Lakes seismic refraction survey (GLIMPCE) [electronic resource] : line A - refraction mode / P. Morel-a-l'Huissier ... [et al.]. Great Lakes seismic refraction survey (GLIMPCE) : line A - refraction mode 1986 Great Lakes seismic refraction survey : line A - refraction mode [Ottawa] : Natural Resources Canada, 1990. 31, [29] p. : charts, maps Open file ; 2283 Historical publication digitized by the Geological Survey of Canada. Cover title. "1990." “In the fall of 1986, the Geological Survey of Canada (GSC), the United States Geological Survey (USGS), two Canadian universities -- University of Western Ontario and University of Saskatchewan, and four American universities -- Northern Illinois University, Southern Illinois University, University of Wisconsin-Madison and University of Wisconsin-Oshkosh participated in a major deep seismic experiment in Lake Superior under the GLIMPCE (Great Lakes International Multidisciplinary Program on Crustal Evolution) umbrella. This Open-File Report presents the seismic sections for line A, which was shot specifically for refraction recording. The main target for study by this line was the Mid-Continent Rift System. All recording stations, 31 in total (26 land stations and 5 OBSs), recorded energy from shots fired every two minutes (333 m spacing) by a tuned airgun array towed by a contracted ship along line A in Lake Superior. These data are the densest such data ever recorded in the continental North America over such distances. It is also unique since coincident seismic reflection and refraction are available”--Abstract, p. 3. Includes abstract in French. Lithoprobe (Project) gccst Geology gccst Seismology Morel-a-l'Huissier, P. Canada. Natural Resources Canada. Geological Survey of Canada. Open file (Geological Survey of Canada) 2283 (CaOODSP)9.506878 PDF 110.97 MB https://publications.gc.ca/collections/collection_2017/rncan-nrcan/M183-2/M183-2-2283-eng.pdf 128170