Till
Unsorted glacial sediment / From Wikipedia, the free encyclopedia
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This article is about glacial sediments. For a point-of-sale device in shops, see Cash register. For other uses, see Till (disambiguation).
Till or glacial till is unsorted glacial sediment.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/8/83/Glacial_till_exposed_in_roadcut-750px.jpg/640px-Glacial_till_exposed_in_roadcut-750px.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/1/14/Till_after_avalanche_in_Norway_%282%29.jpg/640px-Till_after_avalanche_in_Norway_%282%29.jpg)
Till is derived from the erosion and entrainment of material by the moving ice of a glacier. It is deposited some distance down-ice to form terminal, lateral, medial and ground moraines.
Till is classified into primary deposits, laid down directly by glaciers, and secondary deposits, reworked by fluvial transport and other processes.