What term describes the accumulation of materials by a glacier?

The term that describes the accumulation of materials by a glacier is "moraine." Moraines are the landforms created by the debris that glaciers transport and deposit. As glaciers move, they erode the landscape and carry a mix of soil, rock, and other sediments. When the glacier retreats or melts, these materials are left behind, forming a ridge or mound of debris known as a moraine.

Understanding moraines is important as they provide significant information about past glacial movements, including their size and direction. They can be found in various forms, including terminal moraines, which mark the furthest advance of a glacier, and lateral moraines, which accumulate along the sides of glaciers. This term is specifically linked to the direct result of glacial activity, differentiating it from other geological terms related to sediment and landscape formation.