1. Weathering and Erosion: Rocks at the Earth's surface are broken down into smaller pieces (sediments) by wind, rain, ice, and other natural forces.
2. Transportation: These sediments are then transported away from their original location by wind, water, or ice.
3. Deposition: Eventually, the transporting forces lose energy, causing the sediments to settle out and accumulate in layers. This happens in a variety of environments, such as riverbeds, lakes, oceans, and deserts.
4. Burial and Compaction: Over time, more sediment is deposited on top of the older layers, burying them. The weight of the overlying sediment compacts the lower layers, squeezing out water and air.
5. Cementation: Dissolved minerals in groundwater can precipitate between the sediment particles, acting like glue to bind them together. This process is called cementation.
The result of this process is the formation of sedimentary rocks, which are layered and often contain fossils.
These layers provide a record of Earth's history. Studying them can help scientists understand past climates, environments, and lifeforms.
