The New Jersey Department of Environmental Protection's GeoWeb Map Viewer provides a large amount of information on New Jersey's geology, natural resources, and environmental management in interactive map form, including:

The Nevada Bureau of Mines and Geology's Great Basin Geothermal Energy web app provides a large amount of information on geothermal energy in Nevada. The map includes:

The Minnesota Geological Survey's interactive map provides bedrock geology and fault information for the state of Minnesota.

Click here to access the Minnesota Geological Survey's interactive map

Source: Minnesota Geological Survey

The Kentucky Geological Survey's interactive map provides a large amount of information on Kentucky's geology and natural resources in interactive map form, including:

The Maryland Geological Survey, in cooperation with the U.S. Geological Survey, maintains a state-wide network of groundwater observation wells. The data from these wells is used to create an interactive map of groundwater levels in Maryland. The map provides both historical and recent groundwater reading levels across a range of aquifers in the state of Maryland. 

Click here to use the interactive map.

Source: Maryland Geological Survey

The Kansas Geological Survey's interactive map allows you to view a large amount of information on oil and gas resources and activity in Kansas. The interactive map includes:

The Coal Mine Information System was developed by the Indiana Geological and Water Survey and the Indiana Department of Natural Resources. It shows the locations of surface and underground coal mines in Indiana. In addition to coal mines, the map shows active mine permits and can be used to locate underground mine entrances and documented subsidence areas.

The Indiana Geological and Water Survey's Petroleum Database Management System provides an interactive map of more than 70,000 petroleum-related wells in the state of Indiana. The map includes:

The Illinois State Geological Survey (ISGS) is the official repository for the records of existing wells that have been drilled in the state of Illinois. With records for over 700,000 wells, the interactive water wells map allows users to explore a range of information including the location, depth, and bedrock topography for all recorded wells in Illinois. Data for water and related wells exists for private water wells, engineering borings, and stratigraphic borings.

The Idaho Geological Survey's provides a large amount of information on Idaho's geology and natural resources in interactive map form, including:

• Surface geology, including geochemical data
• Oil and gas
• Geothermal wells and thermal springs
• Mine locations
• Aggregate sources
• Young faults

The map allows users to select multiple layers that can be overlain on each other. By doing this, users can see how different features are related.