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Learn about Indiana geology. Interact with Geographic Information Systems and view maps. Learn about the Indiana Geological Survey.

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International Year of Planet Earth logo. Click to link to the IYPE Web site. International Year of Planet Earth


IU Scholar Works logo. Click to view IGS contributions to IU Scholar Works. Indiana University Scholar Works


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Member of the Alliance of Bloomington Museums

Geodes of Indiana poster. Click to link to the IGS Bookstore.

New IGS Poster - Geodes of Indiana


This full-color 26" by 34" poster by Nelson Shaffer highlights some of the unique geodes found in our state. Geodes of Indiana illustrates the geode lifecycle and features stunning photos of geode mineral crystals.This poster is great for naturalists and teachers and can be purchased online through the IGS Bookstore. To receive a discount, purchase this poster as part of a poster set.

Mapping Web Site Changes Name

The Indiana GIS Atlas now has a new name: IndianaMap. Through the collaborative efforts of the Indiana Geographic Information Officer, the Indiana Geological Survey, the Indiana Department of Transportation, and the Indiana Geographic Information Council, the IndianaMap will serve as the definitive statewide map for Indiana.

IndianaMap logo. Click to open the IndianaMap interactive map Web site.

Maria Mastalerz examines a sample at a southern Indiana coal mine.

IGS Geologist Receives Top Honor

The Geological Society of America has named Maria Mastalerz the winner of the 2008 Gilbert H. Cady Award. The award is presented to individuals who have made outstanding contributions to the field of coal geology. Her area of expertise is coal petrology, the science that deals with the origin, history, occurrence, structure, chemical composition and classification of coal. Mastalerz, 51, is the youngest person ever to receive the award, and only the second woman to be so honored. Read the complete story.

New Geology and
Interactive Map Web Site
for Allen County, Indiana

Allen County–A Geologic Atlas is now available online. The atlas includes an interactive map viewer along with illustrations, photos, and descriptions of the geology and landforms of this region. Primary geologic data is also accessible in the form of water-well reports and gamma-ray logs. Visit the site now to create your own custom map!

Allen County Geologic Map. Click to link to the Allen County Geologic Atlas Web site.

Looking for
Historical Aerial Photos?

The Indiana Geological Survey's new IHAPI Web site can help. The Indiana Historical Aerial Photo Index map allows users to easily locate and order high-resolution Indiana aerial photos from the 1930s through the 1980s. While the photos cannot be downloaded, thumbnail images from the IGS collection of nearly 40,000 images can be viewed on the site.

IHAPI image. Click to link to the IHAPI Web site.

The new IHAPI site provides an index to more than 113,000 historic Indiana aerial photos.

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