Here's why:

* Moraine is a landform composed of glacial till, which is a mixture of unsorted rock, sand, silt, and clay deposited by a glacier.

* Glaciers pick up and transport this material as they move, and when they melt, they leave behind these deposits.

There are different types of moraines, depending on their location relative to the glacier:

* Lateral moraine: Forms along the sides of a glacier.

* Medial moraine: Forms in the middle of a glacier, where two lateral moraines merge.

* Terminal moraine: Forms at the end of a glacier, marking its furthest advance.

* Recessional moraine: Forms as a glacier retreats, marking a pause in its melting.

Let me know if you have any other questions!