Explanation:

Terminal moraines are ridges of debris deposited at the glacier's end by the moving ice sheet or glacier. They are formed when a glacier or ice sheet reaches its maximum extent during the advance phase and deposits the debris it has eroded from the valley floor and sides as well as the material it has picked up along its path. Terminal moraines mark the furthest extent of glacier or ice sheet advance and are typically found at the lower end of the glacier's snout.

Composition of Terminal Moraines:

Terminal moraines are composed of a mix of materials, including boulders, gravel, sand, and clay. The size and composition of the debris depend on the nature of the underlying bedrock, the strength of the glacier, and the distance the debris has traveled.

Formation of Terminal Moraines:

Terminal moraines are formed by the accumulation of debris at the glacier's snout as it melts or retreats. As the ice melts, it deposits the debris that it has carried along in a pile at its end. The pile of debris gradually builds up, forming a ridge or ridge-like feature.

Location of Terminal Moraines:

Terminal moraines are typically found at the lower end of the glacier's snout, marking the furthest extent of glacier or ice sheet advance. They can also be found in other locations where glaciers or ice sheets have been active, including valleys, fjords, and coastal plains.

Conclusion:

In conclusion, terminal moraines are made up of the coarse debris deposited at the edge of an ice sheet or glacier. They are formed by the accumulation of debris at the glacier's snout as it melts or retreats and are typically found at the lower end of the glacier's snout, marking the furthest extent of glacier or ice sheet advance.