The process through which fossils and rocks from the older layers can be brought to the surface is called **erosion**.
Here's a step-by-step explanation:
1. Over time, due to natural forces like wind, water, and ice, the top layers of rock and soil can be gradually worn away.
2. As these top layers erode, they expose the layers beneath them, including the older rocks and fossils that were previously buried.
3. Erosion plays a significant role in shaping the Earth's surface and uncovering the geological history preserved in different rock layers.
4. Fossils and rocks from deeper, older layers can be revealed through erosion processes such as water erosion (rivers, streams), wind erosion (deserts), and glacial erosion.
In contrast, **deposition** refers to the process of sediment, soil, and rocks being added or laid down in a new location. So, in this context, erosion is the key process that brings older layers to the surface.
