Answer: Till deposits can be found in regions that have been covered by glaciers, such as areas that were once glaciated during the Pleistocene Ice Age. They can form hills, ridges, and mounds called moraines, which are distinct landforms shaped by the deposition of till. These deposits provide important clues for scientists studying past glacial activity and the geological history of an area. The correct answer is c. till.
Step-by-step explanation:
Till is unstratified and poorly-sorted sediment that is deposited by glacial action. It is composed of a mixture of different-sized fragments, ranging from clay to boulders. This sediment is transported and deposited by glaciers as they move and melt.
Glaciers act as powerful agents of erosion, picking up rocks and debris from the ground as they advance. As the glacier moves, it grinds against the underlying bedrock, breaking off and incorporating rock fragments into the ice. When the glacier eventually melts or retreats, it leaves behind the till as a deposit.
Till is characterized by its lack of sorting, meaning that the sediment particles are not separated based on their size or weight. It is also unstratified, meaning that there are no distinct layers or horizontal bands within the deposit. The mixture of different-sized particles in till reflects the wide range of materials that glaciers can transport and deposit.