The boulders can still be seen scattered throughout the area today. Boulders, carried into northeast Kansas by glaciers, were deposited on a hill near Wamego. The glaciers also left behind a layer of sediment. Finely ground silt, called loess, was sorted and carried by the wind. Thick layers of loess were deposited throughout the area.
Fertile soils formed from loess are good for farming because they contain few rocks.