大象传媒

Glacial landforms created by deposition

The name given to all material deposited by a glacier is called glacial till or . Deposited material creates a range of interesting features such as:

  • - these have a steep and jagged face which has been created by on the sloping side (). On the steep side, () the land is smoothed and polished by the ice through .
The side upland of the ice flow is the stoss side. The downland side is the lee side. Plucking occurs as the ice flow passes over the roche moutonn茅e.
  • - these are rocks that have been deposited by the glacier. They are usually made of a rock type that would not be found in that area. This suggests that erratics can be carried a long way from an area of different geology.
  • - glaciers can move around in unusual ways which produce interesting features. Drumlins are mounds of deposited moraine. They have a steep side and a sloping side. They can be small or large. They are sometimes described as having a 'basket of eggs' topography because of the unusual landscape they create.
The side upland of the ice flow is the stoss end. This is also where the highest point of the drumlin is. The other side is the lee slope.
  • - outcrop of resistant rock with a steep-sided stoss end, created by plucking and a gentle, sloping lee side. This gentle slope is created by the deposition of moraine.
Edinburgh Castle was built on a crag and tail. The crag is the resistant volcanic rock upland of the ice flow. The tail is the softer limestone on the lee side.