If your research or interests lie in the geology of South Dakota, then the state's Geological Survey Program Web site is for you. Offered are online publications and maps, a geologic reference database, a lithologic logs database, digital base maps, a water quality database, and several other quality information sources worth checking out.

This US Geological Survey circular offers the idea of using 3-D geological maps as a foundation for understanding the geology of the Great Lakes region with the hopes of applying this knowledge to fundamental sustainable development issues concerning natural resources of the area. The circular represents the work of a coalition of State and Federal Geological Surveys which advocates the use of...