Glaciogenic Deposits

The materials having heterogeneous sediments composed of an unconsolidated, heterogeneous mixture of clay, sand, pebbles, cobbles, boulders, and mounds of gravel deposited directly by the retreating glacier ice is called as till. Glacial drift is a general term for the coarsely graded and extremely heterogeneous sediments of glacial origin. Glacial till is that part of glacial drift, which was deposited directly by the glacier.

Till is commonly massive, ideally unsorted and unstratified sediment that may be deposited at the terminal moraine, along the lateral and medial moraines and in the ground moraine of a glacier (Figure 1). It is differentiated on particle size distribution, color, composition, cast shape, roundness, orientation and imbrications, and structure of the deposit. Sometimes, till plains also appear as extensive flat plains of till that form when a sheet of ice becomes detached from the main body of the glacier and melts in place depositing the sediments it carried....