A till plain is a large, relatively flat plain of till that forms when a sheet of ice becomes detached from the main body of the glacier and melts in place. Sometimes the sediments in a till plain can contain large boulders. If these boulders are transported a great distance from their place of origin, they are called erratics . Glaciofluvial deposits are generally quite stratified and less assorted in particle size. Outwash deposits are formed when sand is eroded, transported, and deposited by meltwater streams from the glacier's snout and nearby till deposits to areas in front of the glacier.
Glaciofluvial deposits are also directly in front of the glacier.
Where water rich in sediment flows off the snout of the ice, a conical-shaped pile of sediment, known as a kame , can be deposited. Many kames are often found on or at the edge of moraines. Glacier snout and outwash plain, Bylot Island, Canada. Glaciers can also contain sinuous flows of meltwater that occur in ice tunnels at the base of the ice. The beds of these sub-surface glacial streams are composed of layers of sand and gravel .