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Browse Area This area contains short, public-oriented articles about the state's geology, with colorful photos and maps throughout.   Popular Items Land Use in Iowa Geology of Iowa State Parks Loess Hills Region Flood of 1993 Mineral Resources Geology and Archaeology Water Resources Meteorites Wetlands Structural Activity Miscellaneous Items Glaciers in Iowa's Past Mapping Iowa's Geology   POPULAR ITEMS           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 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 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 FLOOD OF 1993 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 METEORITES Iowa's Manson Impact Structure Meteorites in Iowa's History Photos of Iowa Meteorites STRUCTURAL ACTIVITY Iowa Earthquakes Iowa Perspective on Midwestern Earthquakes Midcontinent Rift System in Iowa The Midcontinent Rift: Iowa's Almost Ocean 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 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 LOESS HILLS REGION Gully Erosion Loess Hills: A Geologic View Loess Hills: A National Natural Landmark MINERAL RESOURCES   Fort Dodge Gypsum: A Salt from Iowa's Jurassic Sea   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 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 WATER RESOURCES 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 Agricultural Drainage Wells and Groundwater Quality (Abstracts) 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 The Cambrian - Ordovician Aquifer and the Northeast Iowa Landscape Watersheds & Time Horizons Why Watersheds are Important:  A Lesson from the Rock Valley Project WETLANDS   Iowa's Peatlands Wetlands: Their Geological Connection MISCELLANEOUS ITEMS   Ancient Amphibians Discovered in Iowa Ancient River Channels Iowa's Sesquicentennial Paleokarst in Iowa MAPPING IOWA'S GEOLOGY Bedrock Geology and Bedrock Topography of Iowa 1998 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 Map of Iowa Shaded Relief Map of the Bedrock Surface of Iowa Shaded Relief Map of the Topographic Surface of Iowa Topography of Iowa Topographic Relief Map of Iowa