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All News and Pages Related to "Iowa Geological Survey"

Rock Library

Posted on July 3rd, 2014

The Oakdale Iowa Geological Survey (OIGS) facility houses an unusual collection called the “Rock Library”.  The Rock Library is a collection of rock samples that constitutes the primary resource for understanding Iowa geology. The library includes well chip samples from over 39,000 sites around the state, well core (cylinders of rock drilled for research programs) […]


Posted on June 20th, 2014

Welcome to the Iowa Geological Survey’s people directory! To browse the directory and find contact information for our staff of dedicated professionals, please choose “Staff” or “Students” from the menu at left.  


Posted on May 16th, 2014

Trowbridge Hall (map) 300 Trowbridge Hall 123 North Capitol Street Iowa City, IA 52242 The primary home of the Iowa Geological Survey is on the third floor of Trowbridge Hall on the main campus of the University of Iowa in Iowa City, IA.  Built in 1916 to house the UI College of Dentistry, the building was reprogrammed […]


Posted on May 16th, 2014

The Iowa Geological Survey (IGS) has a long and illustrious history in the state, beginning in 1855, when legislation proposed by Governor James W. Grimes provided for a geological survey of the state, which was led by State Geologist James Hall. It was the start of great things for the state of Iowa, with its […]

Looking to the Future

Posted on May 13th, 2014

The year 1992 marked the centennial of a state geological survey in Iowa. The U.S. Geological Survey celebrated its centennial in 1979. The Geological Society of America celebrated its centennial in 1988, with its ambitious Decade of North American Geology (DNAG) publications project now completed. Our staff’s comprehensive stratigraphic review of the geologic section in […]

History: 1947–90

Posted on May 13th, 2014

In 1947, H. Garland Hershey succeeded Trowbridge, with whom he had served as assistant state geologist beginning in 1939. This was also the watershed year in which the director of the Geological Survey and the chair of the Department of Geology were separated into two full-time positions. Today the Geological Survey and the Department of […]

History: 1892–1947

Posted on May 13th, 2014

A permanent geological survey, as a separate agency of state government, was established in 1892. In accordance with legislative provisions, a Geological Board was also established to govern the broad administrative policies of the survey and to appoint the state geologist. (This board was dissolved in December 1980, and the state geologist is now appointed […]

Data Preservation

Posted on April 30th, 2014

As the repository for the majority of the state’s geologic information, the Iowa Geological Survey (IGS) manages information and/or geologic samples from more than 85,000 unique sites, as well as collections of maps, publications, and other documents.  These collections summarize the research conducted by the IGS and can date back to more than a century […]


Posted on April 30th, 2014

Have a question about Iowa geology? Here are some answers to frequently asked questions.  Are there dinosaur fossils in Iowa? What are the fossils of Iowa? Are there any meteorites in Iowa? What are geodes and how do they form? What are those strange boulders in fields? What is the midcontinental rift? When did oceans […]

Oakdale Iowa Geological Survey Building

Posted on April 30th, 2014

Size: 10,800 sq. ft. Location: University of Iowa Research Park, 100 Oakdale IGS, Iowa City, IA 52242 Building Locator Map The Oakdale Iowa Geological Survey (OIGS) building is on the west edge of the University of Iowa Research Park. The building houses the Iowa Geological Survey’s (IGS) Rock Library, which is the repository for driller’s […]