A long, winding ridge of stratified sand and gravel is known as:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. esker.
- A long, winding ridge of stratified sand and gravel is known as an esker. Eskers are formed by glacial meltwater streams that deposit sediments within a glacier or ice sheet. As the glacier retreats, these deposits are left behind, creating a ridge-like formation.
- Eskers are formed by the deposition of sediment from meltwater streams that flow beneath glaciers or ice sheets. These streams carry and deposit sand, gravel, and sometimes boulders in a confined, winding channel.