Till is a mixture of different sizes of rock fragments, from clay to boulders, and it's often unsorted and unlayered. This is because the glacier acts like a giant bulldozer, picking up and transporting all sorts of material as it moves. When the glacier melts, it deposits this debris in a chaotic heap.
Here are some other terms related to glacial deposits:
* Moraine: A ridge or mound of till deposited at the edge of a glacier.
* Outwash: Sorted and layered sediments deposited by meltwater streams flowing from a glacier.
* Erratic: A large boulder that has been transported far from its source by a glacier.
Let me know if you have any other questions about glaciers or glacial deposits!
