Glacial Moraines
Explanation
Glaciers act as powerful agents of erosion and transportation. As they move, they erode the landscape and carry vast amounts of debris, including large rocks, sand, and silt. When the glacier melts or retreats, this transported material is deposited, creating specific landforms.
Analysis of Options:
- Levees: These are Incorrect. Levees are raised banks formed along rivers due to the deposition of sediments during flooding. They are fluvial depositional landforms, not glacial.
- Glacial Moraines Glacial Moraines: This is Correct. Moraines are accumulations of dirt and rocks (glacial till) that have fallen onto the glacier surface or have been pushed along by the glacier as it moves. Depending on their location relative to the glacier (side, center, or end), they are classified as lateral, medial, or terminal moraines.
- Sand Dunes Sand Dunes: These are Incorrect. Sand dunes are mounds or ridges of sand formed by the wind, typically found in deserts or along coastlines. They are aeolian depositional landforms.
- Stacks: These are Incorrect. Stacks are isolated pillars of rock formed by wave erosion on coastal headlands. They are marine erosional landforms.
Key Takeaway: Glacial Moraines are the primary depositional features formed by the accumulation of unsorted debris (till) transported and deposited by glaciers.