Question

Какую роль сыграли ледники в формировании рельефа? СРОЧНО​

Answer 1

Ответ:

Когда ледники таяли, утворились большие озера и реки. Например: в Канаде

Answer 2

The Role of Glaciers in Shaping the Landscape

Glaciers have played a significant role in shaping the Earth's landscape over millions of years. They have had a profound impact on the formation of various landforms, including valleys, mountains, and lakes. Here are some key points about the role of glaciers in shaping the relief:

1. Erosion: Glaciers are powerful agents of erosion. As they move, they scrape and pluck rocks and sediment from the ground, wearing down the underlying bedrock. This process, known as glacial erosion, can create deep valleys and U-shaped valleys.

2. Deposition: Glaciers also deposit the material they erode as they move. When glaciers melt, they leave behind a variety of sediment, including rocks, boulders, sand, and clay. These deposits, called glacial till, can form moraines, drumlins, and other landforms.

3. Cirques and Arêtes: Glaciers often carve out bowl-shaped depressions called cirques in mountainsides. These cirques can later become the starting point for the formation of glacial lakes. Additionally, the sharp ridges between cirques, known as arêtes, are formed by the erosion of glaciers on both sides.

4. Glacial Valleys: Glaciers can create valleys through a combination of erosion and deposition. As glaciers move, they carve out U-shaped valleys, characterized by steep sides and a flat bottom. These valleys are often wider and deeper than valleys formed by other processes, such as rivers.

5. Fjords: Fjords are long, narrow, deep inlets of the sea that are typically found in areas where glaciers have eroded valleys and then retreated. As glaciers melt and retreat, seawater fills the valleys, creating these distinctive features.

6. Glacial Lakes: Glaciers can also form lakes by carving out depressions in the landscape. When glaciers retreat, these depressions can fill with water, creating lakes. Glacial lakes are often characterized by their clear, turquoise-colored water, which is caused by the presence of fine rock flour suspended in the water.

7. Moraines: Moraines are accumulations of rocks, sediment, and debris that are left behind by glaciers. They can take various forms, including lateral moraines (deposited along the sides of glaciers), medial moraines (formed when two glaciers merge), and terminal moraines (deposited at the furthest extent of a glacier).

8. Eskers and Kames: Eskers are long, winding ridges of sediment that form when meltwater streams flow within or beneath glaciers. Kames, on the other hand, are small, cone-shaped hills that are created when sediment is deposited by meltwater streams on top of a glacier or in depressions within the ice.

In summary, glaciers have played a crucial role in shaping the Earth's landscape. Through erosion and deposition, they have created a variety of landforms, including valleys, mountains, lakes, and fjords. The distinctive features left behind by glaciers provide valuable insights into the Earth's geological history.

I hope this information is helpful! Let me know if you have any further questions.