Carlson, D. R. (David Roy)McGinnis, Lyle D. (Lyle David), 1931-2017Pederson, R.Schafersman, J.S.Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between an observed gravity measurement and value predicted from a generalized earth model), shown as contour lines (isolines) of equal value, Stillwater quadrangle, scale 1:250,000.PDFengMinnesota Geological SurveyPublicSimple Bouguer gravity map of Minnesota, Stillwater sheet, M-35MapsMinnesota1977University of Minnesota