South Dakota Geological Survey General Map 9 100o N O R T 99 o H D A 98 o K O T A 97o 48 47 Kg 49 Kgr Kn 129 White Rock STATE OF SOUTH DAKOTA 1 1 50 Kn 0 2 Wgr 0 0 5 5 0 0 Kfh 0 M. Michael Rounds, Governor 7 1 0 New 5 1 Kp 5 0 1 g 0 7 Kc Kp 128 K 1 1 Effington Kfh 0 0 128 Artas 5 Hecla 0 Rosholt Pollock 7 0 Claire 1 128 0 1750 Long 0 150 City Kgr Kc 5 Kfh Lake Veblen 7 DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES Kg Frederick Steven M. Pirner, Secretary Herreid 127 Kg 750 1 Britton 127 127 50 17 1 2 R O B E R T S Eureka 5 Kg C A M P B E L L 0 750 DIVISION OF FINANCIAL AND TECHNICAL ASSISTANCE Lake 1500 David Templeton, Director Mound 00 M C P H E R S O N City M 15 City Kp Kn 126 M A R S H A L L 1 75 0 126 0 5 Kp 126 7 Leola Kp 1 Sisseton 1500 Kp 00 GEOLOGICAL SURVEY 15 Kp Hillsview Claremont Westport Derric L. Iles, State Geologist Kfh 125 125 Wetonka Eden 0 500 Langford 125 1 150 1 Columbia 5 56 55 0 58 57 Kp 0 63 62 61 60 59 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 0 0 0 0 0 Hosmer 1 5 5 Peever 7 0 0 2 B R O W N 1 Kc 5 1 0 1 1 0 2 124 5 5 Mobridge 1 0 Glenham 124 1 12 124 75 50 0 Kp 10 M Kn Kp 00 Roslyn 0 Bedrock Geologic Map Showing 5 Pierpont 0 2 5 Grenville Selby Java 1 0 7 5 1 2 1 0 0 123 5 Bowdle Ipswich 5 7 2 Groton Kp 123 1 000 Kp 2 123 Wilmot Roscoe Aberdeen 1 Andover 1 Kn Kp 0 0 1 0 7 Configuration of the Bedrock 5 Kc 0 E D M U N D S D A Y Big Stone W A L W O R T H 122 Corona 1 City 5 122 0 Bristol 122 Ortley 0 Webster Wm Summit Akaska Warner Waubay Kgr 1 1250 Kg Surface in South Dakota 7 5 0 Kc Stratford Marvin Kp Wm Lowry 121 46 121 50 Butler 48 47 12 121 51 50 49 0 5 48 47 2 Verdon 49 1 52 51 50 Wm 53 52 51 Twin Milbank 0 M 5 East of the Missouri River 0 2 Brooks Hoven 5 1 Kn 1 2 000 F 0 1 00 Tolstoy 120 Kp 2 Kp 50 Lily 120 120 1750 12 G R A N T Onaka Cresbard Conde F 1250 Mellette Brentford F Chelsea South Kp Dennis W. Tomhave and Layne D. Schulz Northville Shore Stockholm M 1 0 1 119 0 00 Kp 1 2 Wallace 5 M F 2 5 2 119 5 0 Bradley 1 0 0 119 0 Florence Albee 5 1 Strandburg 1 P O T T E R LaBolt 00 0 o F A U L K Turton Kn Lebanon Kn 45 Seneca Revillo 2004 0 0 118 Kp 0 Faulkton 2 118 118 0 0 0 12 Ashton o Gettysburg 2 5 Garden F M 0 1000 45 M City C O D I N G T O N 0 Kn 1 5 0 2 12 5 5 2 1 S P I N 0 K 0 Watertown 5 7 C L A R K 0 1 117 5 2 1 117 12 Kranzburg 50 Kp Rockham Doland Kp Orient Frankfort Raymond Kn 1 Redfield 2 Clark Goodwin Altamont 5 Henry 0 0 Kc 5 Kp 7 Gary 1 0 175 0 116 5 1250 Agar 2 116 1 Kn D E U E L Kp 10 00 Clear Kp Naples Lake Kp Hazel 0 MONTANANORTH DAKOTA MINNESOTA 5 Kc 115 Castlewood 2 Kn 1 115 1 500 0 Tulare 5 S U L L Y 7 1 1 1 Vienna 25 Kp 0 2 0 Kn 5 5 7 p K 0 H A M L I N Brandt 1 M 17 50 Onida Kp 114 Kp SOUTH DAKOTA 114 1 Hayti 250 Kp Kp 1250 0 5 2 1 WYOMING Willow Bryant Hitchcock 1250 Lake Estelline Toronto Astoria 113 Lake 0 0 M Kp 5 Norden i 113 1 IOWA ss 1 1250 ou 50 ri H Y D E 0 NEBRASKA H A N D 0 50 Blunt 1 Erwin Kn Harrold Highmore Miller Kp 112 17 Bancroft 1500 112 50 Ree Heights St. Lawrence Broadland Kp Badger 0 75 White River 1 Bruce Yale 1 Wessington 0 Kp 5 1 Kp 25 MAP AREA 5 0 B E A D L E 1 0 0 K I N G S B U R Y H U0 G H E S 111 1 5 Wolsey 0 Hetland 111 0 1 Kp De Smet 5 Pierre 0 B R O O K I N G S 0 Iroquois Arlington Lake Brookings Preston 1250 1 1 Cavour 7 7 Kp Ku 5 5 F 0 Bushnell 0 0 5 Huron 2 110 110 1 Volga Aurora 2000 Kp 0 Kp 5 0 2 Kn 150 Kp 1 Elkton Virgil Sinai 0 0 0 2 Oldham 109 Xs 1 0 5 5 2 0 1 0 C R O W C R E E K 1750 Ward Nunda Carthage 1 Alpena 5 0 12 0 50 I N D I A N 108 Ramona 1 F 7 5 Kp 0 o Flandreau Wessington 100 1 7 5 Springs Lane B U F F 0 A L O Fort Thompson Woonsocket 107 Kp Kn M I N E R Kn L A K E M O O D Y Xs 1 o 5 J E R A U L D 0 Howard Wentworth R E S0 E R V A T I O N Egan 44 Gann Valley 0 5 1 Roswell Winfred 2 7 Junius Madison 1 5 Ku o Kp 0 Artesian 0 Vilas Colman Kn 44 0 106 Xs Kp Kn 5 1 S A N B O R N 1 5 0 Xs Kp 0 12 Xs Trent 50 1 50 Letcher 0 Canova 105 Xs Ku 1 Ku 2 Xs 5 Kn Kp 0 Storla Kn 1 7 5 0 0 5 Xs 17 Kn Dell 1 Kn 50 1 0 Rapids 5 15 0 Xs Colton 00 00 0 Kc Xcd Xs Sherman 15 Kc Loomis 104 Xs Kc Baltic 00 Xs Chamberlain 5 Pukwana Kimball 1 Salem Garretson Mitchell Farmer Kn 0 Xs 500 5 0 ulton 1 7 F Montrose 50 A U R O R A Xcd 1 1 Kp Mt. Vernon Kc 103 Spencer M I N N E H A H A White Lake Xcd Kn Plankinton Xcd B R U L E 1250 M C C O O K 500 H A N S O N 1 1 Crooks Kn 250 D A V I S O N 1 2 1 Humboldt 5 250 Kc 102 Alexandria 0 Valley Kn 0 1 Hartford Springs 5 Kp 2 Canistota Brandon 7 5 Xs 1 0 Xs 1 Xs 2 Kp Emery Xcd 5 Xs Ku 0 Stickney Bridgewater Ku Sioux 1 SHADED RELIEF MAP OF THE BEDROCK SURFACE 7 Kp Kc 5 Xs Falls Xcd 0 101 48 47 1750 Ethan 50 49 EAST OF THE MISSOURI RIVER 52 51 55 54 53 58 57 56 50 49 61 60 59 52 51 Kg Tu Tu 68 67 66 65 64 63 62 55 54 53 70 69 Kn 57 56 Dolton Xs Kgr 61 60 59 58 Ku Monroe 64 63 0 62 Tea 71 69 68 67 66 65 0 0 70 5 Dimock 50 25 Tu 1 Kn 1 100 12 0 Kp 5 Harrisburg Xs 2 Kn 1 Kn Corsica Marion 12 Xs Kn 5 Kn Milltown Ku 0 Ku Xs Chancellor Kn Parkston Parker Xs ; Kn Kg Platte D O U G L A S 99 Xs Kn Xs 50 Freeman 12 Kc Lennox Worthing 1500 H U T C H I N S O N Kgr DDISCUSSIONISCUSSION 12 Ku Kgr 50 Kd Ku T U R N E R Canton 1 2 5 1250 1 0 1 Kd The mapped area is within the glaciated part of South Dakota, east of the Missouri River. The bedrock surface is mantled by Kg 2 00 5 Kc 0 1 Armour Kn 98 0 5 0 Kn Tu Davis Pleistocene-age glacial sediment of many glacial stages throughout most of the map area. The mantle includes loess which overlies the 0 Kp 1 Hurley 1 Delmont 0 7 00 glacial sediment in many areas. Additionally, the mantle locally includes Holocene-age alluvial, colluvial, and lacustrine sediments. This 5 50 0 Geddes Kp 12 1 5 Olivet Menno combined overburden ranges from a thin veneer to more than 1,000 feet thick on the Coteau des Prairies in northeastern South Dakota. 0 Tripp 0 1500 Tu Xs 0 Fairview 5 Kc 2 C H A R L E S M I X Kp Kn L 1 I N C O L N 1250 97 Kgr Kaylor Kgr Bedrock deposits shown on the map include, from oldest to youngest: Late Archean- to Early Proterozoic-age Milbank Granite, Granite, 15 00 Kg Kn Sioux Quartzite, and Corson Diabase; Late Cretaceous-age Dakota Formation, Graneros Shale, Greenhorn Formation, Carlile Shale, Tu 1500 Viborg Xs Tu Hudson Niobrara Formation, Pierre Shale, and Fox Hills Sandstone; and undifferentiated Tertiary-age sediment (Ogallala Group formations are Centerville Kn Kn Kn Kn Scotland Kn included in this map unit).