Drumlin

• Drumlins are elongated hills.
• They are made up of glacial deposits/till/boulder clay.
• They are unsorted
• Drumlins are formed when the glacier moves over a large rock that it cannot erode. The glacier carries lots of rocks and they get trapped behind the large rock as the ice flows over it.
• The rocks build up and as the glacier moves over, it smooths it out.
• Drumlins are often found in swarms.