Research Phase:
College of Architecture and Landscape Architecture
University of Minnesota, Minneapolis, MN 2001-5

Initial Site Investigation: Aeromagnetic Studies Of Minnesota - Geophysical Evidence Of A Deeply Buried Proterozoic Rift System Passing Beneath Minneapolis

 

Left Image: Shaded-relief Aeromagnetic Map of Minnesota Minnesota Geologic Survey State Map Series, S-18, Modified from Chandler, V. W., 1991; concentric red rings on image: 25 mi., 50 mi., 100 mi., radius from Minneapolis

Right/Top Image: Generalized cross-section of the Mid continent Rift System (after Gibson, 1979) in the Lake Superior area. Numbers refer to densities in g/cm3. Adapted from "The Role of Rifting in the Tectonic Development of the Mid continent, USA," G. R. Keller, E. D.Lidiak, W. J. Hinze and L. W. Braile, Tectonophysics, 94 (1983), 391-412.

Right/Bottom Image: Generalized map of the Mid continent Rift System of North America, after Craddock, 1972, Halls, 1978, and Hinze and Wold, 1982. From "Geologic and Geochemical Evidence for the Nature and Development of the Middle Proterozoic (Keweenwan) Mid-continent Rift of North America," John C. Green, Tectonophysics, 94 (1983), 413-437.

 

Research 2; Research 3; Conceptual 1; Conceptual 2; Conceptual 3; Design 1; Design 2; Quarry 1; Quarry 2