Popular Browsing Subjects This area contains short, public-oriented articles about the state's geology, with colorful photos and maps throughout. Popular Items Earthquakes Floods of 1993, 2008, and 2010 Geology and Archaeology Geology of Iowa State Parks Glaciers in Iowa's Past Iowa Meteorites Land Use in Iowa Loess Hills Region Manson Impact Structure Mapping Iowa's Geology Midcontinent Rift System Mineral Resources Miscellaneous Items Our Common Ground (fact sheets) Powerpoints on Iowa Geology Water Resources Wetlands POPULAR ITEMS           Recent News and Publications           Age of Dinosaurs in Iowa Geologic Sources of Historic Stone Architecture in Iowa Landscape Features of Iowa Geologic Features of Interest in Iowa (interactive map) Water Forms Fossils of Iowa Minerals of Iowa Geology of Iowa: Iowa's Earth History Shaped by Ice, Wind, Rivers, and Ancient Seas Satellite Image of Iowa Satellite Images of Iowa Landscapes Geodes: A Look at Iowa's State Rock Field Travels of Early Iowa Geologists McGregor's 19th Century Refrigerators EARTHQUAKES Iowa Earthquakes Iowa Perspective on Midwestern Earthquakes FLOODS OF 1993, 1998, AND 2010 Devonian Fossil Gorge: In the Coralville Dam Emergency Spillway - 2010 Devonian Fossil Gorge: A Visitor's Guide to Geologic Features at the Coralville Lake Emergency Spillway Flood of 1993 Living with a River GEOLOGY AND ARCHAEOLOGY The Role of Geology in Shaping the Archaeological Record Uses of Geologic Materials by Prehistoric Cultures GEOLOGY OF IOWA STATE PARKS Geology of Backbone State Park Geology of Pikes Peak State Park from Sandstone to Sand Paintings Geology of Wildcat Den State Park Guidebook to the Geology of the Saylorville Spillway after the 1984 flood Guidebook to the Geology of the Saylorville Spillway after the 1993 flood Guidebook to the Geology of the Coralville Spillway, after the 1993 flood Guidebook to the Geology of the Saylorville Spillway after the 2008 flood Guidebook to the Natural and Cultural History of the Mines of Spain State Park Guidebook to the Natural History of Backbone State Park Guidebook to the Natural History of Bellevue State Park Guidebook to the Natural History of Dolliver State Park Guidebook to the Natural History of Lacey-Keosauqua State Park Guidebook to the Natural History of Lake Macbride State Park Guidebook to the Natural History of Ledges State Park Guidebook to the Natural History of Maquoketa State Park Guidebook to the Natural History of Palisades-Kepler State Park Guidebook to the Natural History of Pikes Peak State Park Guidebook to the Natural History of Volga River State Recreation Area and Echo Valley State Park Guidebook to the Natural History of Wapsipinicon State Park Gull Point State Park: A Glacial Legacy Lacey-Keosauqua State Park: Iowa's "Big Bend" Country Pilot Knob State Park Springbrook State Park: Watersheds Past and Present GLACIERS IN IOWA'S PAST Glacial-Age Floods Glacial Boulders in Iowa Glacial Landmarks Trail: Iowa's Heritage of Ice Linked Depressions on the Des Moines Lobe Map of Glacial Geology in Iowa (currently unavailable) Quaternary Geologic Map of Iowa (currently unavailable) IOWA METEORITES Meteorites in Iowa's History Photos of Iowa Meteorites LAND USE IN IOWA Common Ground Connecting with the Land Historic Alteration of Surface Hydrology on the Des Moines Lobe Iowa's Statewide Land Cover Inventory Living with the Land Landcover Map of Iowa (currently unavailable) LOESS HILLS REGION Gully Erosion Loess Hills: A Geologic View Loess Hills: A National Natural Landmark MANSON IMPACT STRUCTURE Introduction to Iowa’s Manson Impact Structure Detailed Discussion of the Manson Impact Structure MAPPING IOWA'S GEOLOGY Bedrock Geology of Iowa 2010 Bedrock Geology of Iowa 1998 Elevation and Shaded Relief of the Bedrock Surface of Iowa Landform Regions of Iowa Landform Regions and Surface Topography of Iowa Mapping for the Next Century Natural Resource Mapping of Linn County Rivers and Lakes of Iowa Satellite Image of Iowa Shaded Relief of Iowa Shaded Relief of Iowa with Discussion Surface Elevation and Shaded Relief Map of Iowa Surface Elevation of Iowa and Surrounding Area MIDCONTINENT RIFT SYSTEM Introduction to the Midcontinent Rift System Detailed Discussion of the Midcontinent Rift System of Iowa Exploring the Midcontinent Rift (Publication) Explore the Midcontinent Rift in Iowa and Minnesota (Poster) MINERAL RESOURCES Fort Dodge Gypsum: A Salt from Iowa's Jurassic Sea Gold Guidebook to Geologic points of interest in the Fort Dodge area Guidebook to the Geology of the Jurassic Fort Dodge Formation Guidebook to the Geology of the Fort Dodge Formation (Upper Jurassic) Webster County, Iowa Guidebook to the Production of Cement at Mason City Gypsum Resources of Iowa Iowa's Cement Industry Iowa Coal: Fuel for a New State's Growth Ground Collapse Over Abandoned Mines Underground Coal Mines: Historic Records Compiled Analyses of Iowa Coal - 1929 (pdf) Strippable Coal Reserve Study in Selected Iowa Counties (pdf) Strippable Coal Reserve Study in Seven Iowa Counties (pdf) Studies of Iowa Coals - Tech Paper 2 (pdf) Coal Geology of Iowa- 2002 Keystone Coal Industry Manual (pdf) Lead and Zinc Mining in the Dubuque Area Lithograph City Mineral Production in Iowa Mineral Resource Facts Oil Exploration in Iowa Peat Production and Protection in Iowa Peat Facts Sand and Gravel Resources of Iowa Underground Limestone Mining Underground Storage of Gas MISCELLANEOUS ITEMS Ancient Amphibians Discovered in Iowa Ancient River Channels Iowa's Sesquicentennial Paleokarst in Iowa POWERPOINTS ON IOWA GEOLOGY Life of the Past (PowerPoint slide show) The Rocks (PowerPoint slide show) The Surface (PowerPoint slide show) WATER RESOURCES Agricultural Drainage Wells and Groundwater Quality (Abstracts) Agriculture and Groundwater: The View from Big Spring A View of Underground Water Baseflow: Where Groundwater Meets Surface Water Closure of Agricultural Drainage Wells (ADWs) Improves Water Quality Iowa’s Groundwater Resources IOWATER: Making a Splash with Volunteer Monitoring Keeping Ahead of Groundwater Quality Questions Keokuk Water Works:  Its Geological Foundations Jumbo: A Runaway Artesian Well Monitoring Iowa's Waters Salt and Pepper Sands of Western Iowa Sediment Transport Studies at Walnut Creek State Water Plan The Cambrian - Ordovician Aquifer and the Northeast Iowa Landscape Water Resources Management Program Watersheds & Time Horizons Why Watersheds are Important:  A Lesson from the Rock Valley Project WETLANDS Iowa's Peatlands Wetlands: Their Geological Connection