Iowa Summer Day Camps

Iowa Geography

Boundaries List of counties in Iowa Topography of Iowa, with counties and major streams. Iowa is bordered by the Mississippi River on the east; the Missouri River and the Big Sioux River on the west; the northern boundary is a line along 43 degrees, 30 minutes north latitude. The southern border is the Des Moines River and a not-quite-straight line along approximately 40 degrees 35 minutes north, as decided by the U.S. Supreme Court in Missouri v. Iowa after a standoff between Missouri and Iowa known as the Honey War. Iowa is the only state whose east and west borders are formed entirely by rivers. Source: http://www.50states.com/facts/iowa.htm Iowa has 99 counties, but 100 county seats because Lee County has two. The state capital, Des Moines, is located in Polk County. Geology and terrain Geology of Iowa Iowa's bedrock geology generally increases in age from west to east. In northwest Iowa Cretaceous bedrock can be 74 million years old, in eastern Iowa Cambrian bedrock dates to ca. 500 million years ago. Iowa is generally not flat; most of the state consists of rolling hills. Prior divides Iowa into eight landforms based on glaciation, soils, topography, and river drainage. Loess hills lie along the western .