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Iowa Geological Survey drill rig

New Drill Rig for IGS

Posted on October 6th, 2017

Our new drill rig was recently used for some drilling near the Winneshiek Shale outcrop. We look forward to its involvement in many more projects including Statemap and the Iowa Watershed Approach this year.  


2017 STATEMAP Project Produces New Maps

Posted on July 28th, 2017

Recently completed surficial and bedrock geologic maps and summary reports are now available on the IGS publications page. These maps were produced as part the IGS’s ongoing participation in the USGS STATEMAP program. 1:24,000 scale bedrock and surficial geologic maps were produced for two quadrangles in Floyd County and two quadrangles in southeast Iowa. These […]

Beaver Creek watershed monitoring

Posted on July 28th, 2017

Monitoring and water sampling is being done this summer at nine newly constructed wetlands in the Beaver Creek watershed area of Floyd and Chickasaw counties by summer intern, Ian Simpson, from Ohio Northern University in Strongsville, Ohio. The wetlands were constructed as part of a flood mitigation strategy for the area funded by the Iowa […]

The Winneshiek Geologic Discoveries

Posted on July 10th, 2017

Iowa Geological Survey Geologist, H. Paul Liu, will present “The Winneshiek Geologic Discoveries – An Unusual Setting for Exceptional Fossil Preservation”, at Saylorville Visitor Center Theater at 2:00pm, Saturday, July 15, 2017.  A lecture in the Iowa Academy of Science Speaker Series at Saylorville.  Information on the complete series may be found at

2017 RAGBRAI Brochures

Posted on July 10th, 2017

RAGBRAI (the Register’s Annual Great Bicycle Ride Across Iowa) is an annual seven-day bicycle ride across the state of Iowa. This is the ride’s 45th year, and it is the oldest, largest, and longest bicycle touring event in the world. Continuing the tradition, the Iowa Geological Survey, with support from the Iowa Limestone Producers Association, […]

Geophysics Technology Assists with Well Placement

Posted on July 6th, 2017

The Iowa Geological Survey recently assisted the City of Marion with siting a new production well in the Silurian aquifer. Geophysical surveys identified a zone of fractured and/or karst rock, which typically yields more groundwater than surrounding rock. As the drilling nears completion, preliminary tests suggest that this new well may be one of the […]

Groundwater Vulnerability

Posted on June 30th, 2017

A recent study by the Iowa Geological Survey, Groundwater Vulnerability in the Manchester, Iowa, Area, shows that the Manchester area is vulnerable to high nitrate concentrations because the Silurian aquifer is overlain by variably thin and sandy surficial materials that promote water infiltration. Study results are intended to assist with developing strategies for nitrate reduction […]

Delving Deeper

Posted on June 20th, 2017

IGS research has been featured on the National Geographic Channel’s “The Strange Truth”, and in the 2017 UI Mobile Museum. Researchers from the Iowa Geological Survey discovered evidence of a meteorite impact near Decorah, Iowa in Winneshiek County. This event took place during the Ordovician Period, 465 million years ago, when Iowa was covered by […]

New publication for Schilling and Jones

Posted on June 14th, 2017

IIHR – Hydroscience & Engineering research engineers, Keith Schilling and Chris Jones, have a recent publication in the Journal of Hydrology, “Use of water quality surrogates to estimate total phosphorus concentrations in Iowa rivers.” The complete article is available at  

New water quality project in Lime Creek watershed

Posted on June 1st, 2017

A new project funded by the Iowa Nutrient Reduction Center is aimed at understanding the nutrient reduction benefits found in roadside ditches. The study, led by Dr. Keith Schilling from the Iowa Geological Survey at the University of Iowa, is being conducted in the Lime Creek watershed in Buchanan County. Six roadside ditches in the […]