What is difference between Drumlin and Roche Mouton nee?

Answer 1

The difference is that a Roche Moutonée is an erosional landform whereas a drumlin is a depositional one. A Roche Moutonée is formed by a glacier moving over the top of the rock plucking one side giving it a jagged edge and abrading the other side giving it a smooth edge. A drumlin on the other hand is deposited by the glacier and are streamlined into elongated hills by the glacier. Drumlins are unknown as to how they are formed with there being many theories as to how they are made but one I feel sounds likely is that when it melts out of the subglacial layers it is lodged on the floor and is shaped by the glacier into the shape. Hope this helps you!