1. Weathering: This is the breakdown of existing rocks (igneous, metamorphic, or even other sedimentary rocks) into smaller pieces. This can be caused by:
* Physical weathering: Freezing/thawing, abrasion, wind, rain, plant roots.
* Chemical weathering: Dissolution, oxidation, hydrolysis.
2. Erosion: The movement of weathered material by wind, water, or ice.
3. Transportation: The carrying of sediments away from their source by wind, water, or ice. This process can further break down and round the sediments.
4. Deposition: The settling and accumulation of sediments in a new location, usually in a basin like a lake, ocean, or riverbed.
5. Compaction: As sediments accumulate, the weight of the overlying layers presses down, squeezing out water and air, and compacting the sediment.
6. Cementation: Dissolved minerals in the water that permeates the sediment crystallize, binding the sediment grains together, forming a solid rock.
Therefore, the forces involved are:
* Gravitational force: Plays a role in erosion, transportation, and deposition.
* Forces from wind and water: Drive erosion and transportation.
* Pressure from overlying layers: Causes compaction.
* Chemical bonding forces: Responsible for cementation.
It's crucial to remember that forming sedimentary rocks is a long and complex process, requiring a series of interconnected events.
