Geologic Map of South Dakota

This is a recently published 1:500,000-scale geologic map. It represents major revisions of previous editions, and it is an important new source of regional geologic information pertaining to water resources, mining, recreation, geologic hazards, paleontology, and environmental issues.

This new map reflects the quantity and quality of geologic information available since publication of previous state geologic maps more than 50 years ago. Knowledge of the geology of the Black Hills uplift has progressed tremendously in recent decades, allowing a far more accurate and detailed portrayal of that region. Compilation of newly acquired information regarding structural features and surficial deposits throughout western South Dakota are also significant advances. The portrayal of South Dakota east of the Missouri River illustrates the most complete compilation of glacial deposits in this area to date. In addition, the digital format enables evaluation of GIS data of all types, such as agricultural, environmental, and geotechnical, with respect to the underlying geology.

This map is available for purchase from the South Dakota Geological Survey. Call 605-677-5227, or visit the survey online, where GIS layers and a PDF version of the map are available.