Drumlin Field

A drumlin field, also called a drumlin swarm, is an assemblage of many drumlins, the elongated hills shaped by glacial ice, clustered together across a landscape. The drumlins within a field are typically similar in size and shape and are aligned parallel to the direction the ice once flowed, giving the landscape an appearance often described as basket of eggs topography. Many drumlin fields left behind from the last ice age fan outward across the land, a pattern that lets geologists reconstruct how far and in what direction the ice that shaped them once moved. The largest drumlin fields in the world formed beneath the Laurentide Ice Sheet and are found across Canada and the northern United States.