What is a characteristic of till as a geological material?

A characteristic of till as a geological material is that it is a heterogeneous mixture of particles. Till is primarily formed from the processes of glaciation, where glaciers transport and deposit a mix of sediments that vary in size—from clay to boulders—without any specific sorting or uniformity. This mixture reflects the diverse source materials carried by the glacier, resulting in a complex, variable composition typical of till deposits.

In contrast to this characteristic, well-sorted and stratified materials would imply a more uniform distribution of particle sizes, which is not the case for till. Similarly, consistent particle size would indicate a sorting process that organizes sediments based on size, which does not occur in till. Lastly, while till can be found in various landscapes, it is not specifically or exclusively associated with flat valleys; rather, it can appear in a range of topographies, especially where glacial action has impacted the land. Thus, the heterogeneous nature of till is a defining feature that sets it apart from other geological materials.