Which action is responsible for the formation of Eskens ?
Fluvio-glacial deposition
Eskers (printed here as Eskens) are long, narrow, winding ridges of sorted sand and gravel found in areas once covered by ice sheets.
They are laid down by meltwater streams flowing in tunnels within or beneath a glacier, so the material is stratified and rounded like river deposits.
When the ice melts away, the channel fill is left standing as a sinuous ridge, which makes eskers a landform of fluvio-glacial deposition.
Erosional work produces features such as cirques and U-shaped valleys, and direct glacial deposition produces unsorted till features such as moraines and drumlins, not stratified ridges.
Hence, Fluvio-glacial deposition.
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