Geology

An understanding of the vast history of South Dakota begins with the geologic story of the Black Hills, revealing how our region evolved and how the land around us was created. Exhibits, many established by the South Dakota School of Mines & Technology Museum of Geology, will help you discover the history of the land, its fossils, and other geological items that lead to a better understanding of South Dakota history.

As you dive deep into the geological story of the Black Hills, you will find a history so rich in fossils and geological development, that you will not recognize the Black Hills you have grown to know and love. Learn how the hills were formed over the past 2.5 billion years as revealed in the rocks and fossils displayed here.

When gazing out upon the pine-covered landscape of the Black Hills or the rolling and desert-like Badlands, it's hard to believe that the rock layers reveal that ancient seas covered the area, that at other times dinosaurs roamed here, and that later still rhinoceri and early horses trod the area. As you continue your journey through our museum, you will learn not only how the hills were formed, but how they are utilized and enjoyed by visitors, Black Hills residents, and Lakotas to help enrich their lives. South Dakota history is rich and the geology of the land is a long, and intriguing, portion of that history.