Landforms of glacial erosion

Cirques:

A cirque is the birthplace of a glacier. It is armchair shaped and has three sides and usually a lake in the middle. As snow fell and landed in the cirque it was compressed to ice and slowly plucked rocks from the sides which made the cirque deeper and wider. The ice continued to bulid up and eventually flowed over the hollow and became a glacier moving down hill. The ice finally melted in the cirque and it became a lake, called a tarn.

Aretes:

When two cirques form back to back, a narrow ridge is created inbetween them, this is know as an arete. When three or more cirques form around a mountain the middle pointed part is called the pyramidal peak.

Glaciated Valleys:

A glaciated or U-shaped valley was created when the glacier began to move down hill. It took the most direct root in its path which in most cases is the V-shaped valley where a river once was.
The glacier widened and deepened the river valley changing it to a U-shaped valley.

Ribbon Lakes:
Ribbon lakes are lakes on the floor of the glaciated valley. They were formed when the glacier scoped out hollows in the valley floor. Then when the glacier melted these hollows trapped the water to form lakes.

Hanging Valleys:
A hanging valley occurs when the main glacier deepens and widens but the smaller one is not strong enough to so it hangs over it. So when the glaciers melted it became a water fall because the water melted off the smaller glacier and fell down to wear the main glacier was.

Fiords:

Fiords were once glaciated valleys but got flooded by the amount of water when the ice melted. They are long narrow inlets that are very deep and have steep sides.