Two new maps by IGS hydrogeologist Sally Letsinger show the relative risk of Indiana's aquifers to contamination. She and other IGS researchers have been working to understand the factors that control the rate of infiltration, or groundwater recharge, into the subsurface. Most groundwater contaminants are transported along with water from the surface to the water table, and so recharge is a significant control on aquifer sensitivity to contamination. These maps identify the locations where water, and therefore, potential contaminants applied at or near the ground surface, are expected to rapidly infiltrate into the subsurface.
Major Sources of Carbon Dioxide Emissions from Coal in Indiana
This new IGSMap contains information about CO2 emissions from coal in Indiana. The collection of maps shows major point sources of CO2 emissions, including commercial and municipal electric power plants and industrial and institutional coal-fired boilers, and the Indiana coal mines that supply them. In addition, Indiana coal-related CO2 emissions from 2010 are compared to CO2 emissions from other states during the same time period.
The Indiana Geological Survey maintains a library of rock core for scientific research of professional geologists. This photograph from a rock core shows the calcite-filled and acorn-shaped theca of blastoids in the Salem Limestone (Mississippian ).
Locations of Wells in the Trenton Oil and Gas Field
More than 3,000 maps and plats are being used to resolve conflicting or missing locations reported for ~36,000 wells in the Trenton Oil and Gas Field of eastern Indiana since its discovery in 1889. GIS (geographic information system) methods are used to integrate six main generations of map data. Thanks to the Indiana Oil and Gas Association for its generous support.