Geophysical surveys; Seismic refraction method; Shields (Geology); Cannon River (Minn.)
A geophysical survey in the area of Northfield, Minnesota, involving electrical earth resistivity profiling and seismic refraction soundings, showed sizeable buried river channels in the bedrock in the Cannon River Valley which greatly increase in size downstream of Northfield. The channels upstream from the Northfield appear to be continuous and connect with the large buried channel between Northfield and Cannon Falls. The major buried valley deviates from the modern course of the Cannon River within the City of Northfield, but appears to follow elsewhere.
Vick, T. D.,
Cowan, C. A.,
Packer, D. J.
Buried Bedrock Topography of the Cannon River System Around Northfield, Minnesota.
Journal of the Minnesota Academy of Science, Vol. 48 No.2, 19-23.
Retrieved from https://digitalcommons.morris.umn.edu/jmas/vol48/iss2/7