Some Glacial Terminology Slide 21 of 37 Some Glacial Terminology Drift is any material laid down directly by ice or deposited by glacial activity. Till is unstratified drift. Moraines are formed by deposits of till. Stratified drift forms outwash plains, eskers and drumlins. Drumlins are smooth, streamlined hills fromed within glaciers.
Eskers are long sharply defined hills of stratified drift formed by streams under glaciers.