Abrasion In glaciers abrasion occurs when rocks and stones are picked up by the glacier and are rubbed against the bedrock at the bottom and side of the glacier as it moves.

Arête A steep-sided, sharp-edged bedrock ridge formed by two glaciers eroding away on opposite sides of the ridge.

Drumlin Drumlins are formed of till. They are elongated features that can reach a kilometer or more in length, 500m or so in width and over 50m in height. One end is quite step, whilst the other end tapers away to ground level.

Esker a long, narrow, winding ridge composed of stratified sand and gravel deposited by a glacial melt water stream. Eskers may range from 16 to 160 feet in height, from 160 to 1,600 feet in width, and a few hundred feet to tens of miles in length.

Erratics Glacial erratics are stones and rocks that were transported by a glacier, and then left behind after the glacier melted.

Striations Glacial striations are scratches or gouges cut into bedrock by glacial abrasion.

Horn is an angular, sharply-pointed mountain peak which results from the cirque erosion due to multiple glaciers diverging from a central point.

Kettle Lake A kettle (kettle hole, pothole) is a shallow, sediment-filled body of water formed by retreating glaciers or draining floodwaters.

Moraine are long, sharply crested ridges made up of a mixture of sand, gravel, and rocks that have been deposited by a melting glacier

Tarn A tarn is a mountain lake or pool, formed in a cirque excavated by a glacier. It is formed when either rain or river water fills the cirque. A moraine may form a natural dam below a tarn.

Cirque The concave amphitheatre shape is open on the downhill side corresponding to the flatter area of the stage, while the cupped seating section is generally steep, cliff-like slopes down which ice and glaciated debris combine and converge from the three or more higher sides.