The Glaciated Till Plains The Glaciated Till Plains was once covered by glaciers. It has Rich fertile land left behind by glaciers. It has rolling hills and flat plains. The Mark Twain cave is located in the Glaciated Till Plains. It is located north of the Missouri river. The resources found in the Glaciated Till Plains are hogs, sheep, wheat, soybean, clay, corn, coal, fruit, and cows. The biggest lake in the region is Mark Twain Lake. The smallest lake is Pah Lake. This region also has bears, deer, and coyotes. The Glaciated Till Plains gets about 35 inch of rain fall each year. The average temperature for January is about 24-28degrees. The average July temperature is about 77-78 degrees. In the Glaciated Till Plains, it snows a lot in the winter and it is not very hot in summer. By: Logan, Anthony, Michaela, & Jerrica