A medial moraine is a ridge of material marking the center of a former glacier, especially noticeable in glaciers which are confluent. Terminal Moraines are piles of material dropped by the glacier at its terminus, and these terminal moraines therefore mark the furthest advance of a glacier. A glacier in retreat, therefore, will show a series of recessional moraines , showing spots where its length stabilized for periods of time. Melted chunks of ice left by a retreating glacier can often form kettle lakes . Given the right rainfall conditions, these lakes can be transient, or remain permanently.
Glaciers can also forms hills called eskers and drumlins .
The former are winding affairs from streams on or under a glacier, the latter are teardrop shaped affairs. Where the Glaciers Are Page, you might be scratching your head in disbelief. There is certainly no big ice sheets there today. As you will see, just like in the case of Alpine Glaciers, Continential Glaciers leave some tell tale geologic fingerprints to show where they have been. Like Alpine Glaciers, Continential Glaciers show their even more pronounced Terminal Moraines.