Advancing about one foot per day , glaciers flattened most of northern Indiana.
Glaciers are huge sheets of snow, ice, and rubble that the ice picks up as it travels.
However, the area from Terre Haute south was almost untouched by glaciers. The Glaciers made two different geographic regions in Indiana. They created the plains from hills and mountains. The plains are divided into two different geographic areas, the Great Lakes Plain and the Central Till Plain. The Great Lakes Plain is rockier than the Till Plain.