Glaciers are large masses of ice that move slowly over the land. As they move, they pick up rocks and other debris, which become embedded in the ice. These rocks act as sandpaper, grinding down the surface of the Earth and creating features such as moraines, valleys, and cirques.
Moraines are ridges of rock and debris that are deposited by glaciers. As a glacier moves, it carries rocks and debris along with it. When the glacier stops moving, the rocks and debris are deposited in a ridge called a moraine.
Valleys are deep, narrow depressions in the Earth's surface that are formed by glaciers. As a glacier moves, it erodes the land beneath it, creating a deep, valley-shaped depression.
Cirques are bowl-shaped depressions in the Earth's surface that are formed by glaciers. As a glacier moves, it plucks away rock from the sides of a valley, creating a bowl-shaped depression called a cirque.
