Feature Name A B Medial moraine


This is found in the middle of a glacier when two glaciers have merged. The two lateral moraines on each glacier met and combined.


C


Description of feature


D


(ii) Drumlins are oval-shaped hills that are formed from deposits of boulder clay. They are a feature of glacial deposition.


(a) Place an arrow on the image below to show the direction of glacial flow as the drumlin was being formed.


(b) Drumlins occur in swarms known as:


(c) Below are the steps involved in the formation of a drumlin. Place the steps in the correct order of formation by numbering them 1, 2, 3, etc.


Steps in the formation of a drumlin


The gentle slope of the drumlin points to the direction in which the ice was travelling. The steep side is the side from which the glacier advanced.


The glacier retreats, but then it advances again.


Glacial ice drops and deposits boulder clay in large irregular heaps on the land. As the glacier advances again, it begins to shape and smooth the boulder clay into more rounded, oval-shaped hills.


13 GLACIATION 141 Number


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