"In geology, drift is the name for all material of glacial origin found anywhere on land or at sea, including sediment and large rocks (glacial erratic). ...
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Glacial origin refers to erosion, transportation and deposition by glaciers.
In the UK, the term ´drift´ is commonly used to describe any deposits of Quaternary age.[citation needed]
The Driftless Area refers to an unglaciated portion of North America devoid of the glacial drift of surrounding regions." - (en.wikipedia.org 09.03.2020)