and where did it come from?
2007-03-12 13:38:40 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
The material dropped from a glacier is called till (one characteristic of till is that it is completely unsorted, that is all different particle sizes may be present..from clay to boulder size--that's why it was once called boulderclay!).
Till can take several forms, such as moraines (which can be hilly or flat-the flat form is called ground moraine) and drumlins. The material is picked up by the glacier and laid back down when the glacier melts or recedes. In the case of end or terminal moraines the material is transported by the ice and accumulates at the end of the glacier (the ice itself always moves away from it's 'source', even though the foot of the glacier may be receding).
Boulders laid down by glaciers (the boulders can be exceedingly large) that are not like the bedrock in an area, are called erratic boulders, or simply, erratics.
2007-03-12 14:41:53 · answer #1 · answered by David A 5 · 0⤊ 0⤋
The material that you are speaking of is what the glacier picks up, if a glacier suddenly retreats, the till that left there is known as the end moraine. Moraine is the proper term for the unconsolidated debris that you are speaking of.
2007-03-12 20:59:02 · answer #2 · answered by ? 6 · 0⤊ 0⤋
If it's a glacier, then it is the material it picked up as it moved across the ground. Usually rocks, since they can survive the process best.
2007-03-12 20:46:57 · answer #3 · answered by Anonymous · 1⤊ 0⤋
The material picked up and later dropped by a glacier is called "glacial drift".
2007-03-12 20:52:39 · answer #4 · answered by brooks b 4 · 0⤊ 0⤋
WATER, THE ICE
2007-03-12 20:46:39 · answer #5 · answered by LC 1 · 0⤊ 0⤋