The Winneshiek Lagerstätte
Many paleontologists call it “the discovery of the decade in Ordovician paleontology”. Rare fossils found in a new stratigraphic unit recognized in northeast Iowa near Decorah.
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Recent Survey Publications
Groundwater Issues in the Paleozoic Plateau Water Quality Monitoring in the Hoover Creek Watershed 2004-2006, Johnson and Cedar Counties RAGBRAI 2008 brochures Hydrology of Pre-Illinoian Till at the I-380 Rest Stop Site, Linn County Water Quality Monitoring in the Yellow River Watershed 2005 Walnut Creek Watershed Restoration and Water Quality Monitoring Project, Jasper County
Exploring the Midcontinent Rift
The Midcontinent Rift is a failed rift, a great rip through the earth's crust stretching for a thousand miles and crossing the center of Iowa. Organic-rich lake sediments are potential petroleum source rocks and overlying coarse clastics may serve as reservoir rocks.
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Our Common Ground Fact sheet (Pdf)
Download Poster (7.8Mb Pdf)
New Resource Information Fact Sheets
Our Common Ground
“Our Common Ground” is a series of Resource Information Fact Sheets describing services and information available at the DNR-Geological Survey. We strive to make information and technical assistance on earth and water resources available to Iowans.
Topographic Maps and Base Maps
Easily locate and order U.S. Geological Survey 7.5 minute quadrangle maps, county topographic maps and other popular maps of Iowa with our new easy to use Web interface. These maps of local terrain conditions serve outdoor recreation enthusiasts as well as scientists and other professionals.
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Iowa's Water Quality Database Ultimately we envision Iowa STORET as a “one-stop shopping” location for all the state’s water monitoring data.
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Geosam is the Iowa Geological Survey's geologic site and sample tracking program. |
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Iowa's Groundwater Basics A geological guide to the occurrence, use, and vulnerability of Iowa's aquifers. |
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This book is a portrait of Iowa's land and resources as we see them today and as they were originally. |
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A window on YOUR environment. |
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