GENERAL GEOLOGY

Detailed explanation-1: -Eskers are ridges that are made up of sand and gravel. They are believed to form when the sediments that are carried by glacial meltwater get accumulated in subglacial tunnels.

Detailed explanation-2: -Depositional landforms by glaciers are Moraines, drumlins, eskers, and outwash plains.

Detailed explanation-3: -Thus eskers are considered to be channel deposits (left by streams that flowed through tunnels in and below the ice) that were let down onto the ground surface as the glacier retreated.

Detailed explanation-4: -Eskers are believed to form when sediment carried by glacial meltwater gets deposited in subglacial tunnels, which given the importance of subglacial water for ice dynamics means that eskers can provide important information about the shape and dynamics of ice sheets and glaciers.

Detailed explanation-5: -An esker is formed when a glacier melts. During the melting process streams are formed by the melt water as it flows away from the glacier. These streams deposit debris picked up from when the glacier was moving. When the glacier has melted away the left over ridge left behind from the stream deposits is an esker.