Prairie Pothole Region
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The Prairie Pothole Region (PPR) is an area of the northern Great Plains that is covered with grass-covered wetlands. The PPR is pockmarked with thousands of shallow ponds, known as potholes. These potholes are the result of prior glacier activity and after the end of the last glacial maximum, which ended approximately 15,000 years ago, the regional topography consisted of potholes and drumlin fields. The depressions created by the weight of the ice sheet later filled with water as the glaciers retreated. The region is important to both agriculture and wildlife, especially fish and birds.
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