Minor landforms include a till plain, beach ridges, sand dunes, and water reworked till. The greatest depth of lake laid sediments is found along the Red River, which forms the west boundary. Lacustrine origin sediments thin to the east, where glacial till was leveled and reworked with little deposit of lacustrine sediments. Topography is level to gently rolling. There is some steeper topography along drainages and adjacent to Lake Traverse.
Glacial drift is underlain by Precambrian bedrock in the east.
There are bedrock exposures along the shores of Lake Traverse in the southwest. These are sedimentary bedrock and contain many fossils. Virtually all of the poorly drained soils have been ditched and drained for agricultural use. Saline soils are present in localized areas. Dry, sandy and gravelly soils are characteristic of beach ridges found throughout the unit.