1. Weathering: Igneous rocks exposed at the Earth's surface are broken down by weathering processes. This can include:
* Physical weathering: Forces like wind, rain, ice, and temperature changes break down the rock into smaller pieces.
* Chemical weathering: Rainwater and other chemicals react with the minerals in the rock, dissolving or altering them.
2. Erosion: The weathered fragments of igneous rock are then transported away from their original location by wind, water, or ice.
3. Deposition: As the transporting force loses energy, the fragments settle and accumulate in layers. This happens in places like riverbeds, lake bottoms, or oceans.
4. Compaction: The weight of the overlying sediment layers presses down on the deposited fragments, squeezing out water and air. This compacts the sediment into a denser mass.
5. Cementation: Minerals dissolved in groundwater precipitate between the sediment grains. These minerals act as a glue, binding the grains together and forming solid rock.
The resulting rock is called sedimentary rock. It's important to note that not all igneous rocks become sedimentary. Some are buried deep within the Earth and undergo metamorphic transformation instead.
Here's an analogy: Imagine a large rock being broken into smaller pieces by a hammer (weathering). Then imagine these pieces being carried away by a stream (erosion) and eventually deposited in a pile (deposition). Over time, the weight of the pile (compaction) and the minerals in the stream water (cementation) bind the pieces together into a solid rock (sedimentary rock).
