Origin of 9-11 Relation to quartzite 19 Structure of 8 Quartzite (see also Baraboo quartzite ranges)-- Dynamic Metamorphism of 24 Erosion of 25 Origin of 23 Submergence of 27 Thickness of 26 Uplift of 24 Rapids 48 Rejuvenation of streams 56 Ripple marks 9, 15 Roches moutonnée 81 Sandstone (see Potsdam and St. Peters). Sauk Prarie 117, 118, 119 Skillett Creek 8, 53, 138 Slope of upper surface of ice 111 Snow fields 74 Soil 7, 144, 146 Stand rock 70 Steamboat rock 70 St. Peter's sandstone 32 Stratified drift 111-112, 125 Streams, changes in 138 Subaqueous overwash plains 120 Subglacial till (ground moraines) 99 Sugar Bowl 70 Talus slopes 65 Terminal moraines-- Across the United States 78 Development of 102 In Devil's Lake region 105 Boundaries of 106 Location of 92, 93, 108 On the main quartzite range 107 Width of 106 Topography of 103 Till 97 Topography-- Effect of, on ice movement 89 Erosion topography 12 Of drift-covered country 8, 143 Of driftless area 6, 7, 12, 143