Also known as boulder clay, the unsorted
material left behind on the land after the retreat of a glacier.
Till is a heterogeneous mixture of different sized material deposited by
moving ice (lodgement till) or by the melting in-place
of stagnant ice (ablation till). After deposition, some
tills are reworked by water.
|The surface of the ground in this area adjacent to
Sherman glacier is covered with a coarse glacial till. Chugach Mountains,
Chugach National Forest, Alaska. Credit: USGS
See also drift, drumlin,