What represents a former meltwater channel or tunnel in glacier ice that was filled with sand and gravel?

A former meltwater channel or tunnel in glacier ice that was filled with sand and gravel is known as a "kame." These landforms are created when meltwater flows through the glacier, depositing sediments as the ice retreats. Kames can appear as mounds or hills of sediment and are often found in glacial landscapes, indicating past glacial activity.