Process of weathering: Rain, wind, water and plants began breaking down the igneous rock into smaller rock
Process of erosion: Sediments are moved by wind, water and ice into low-lying areas
This is the explanation of how sediment rock was formed.
Deposition of sediments
Eroded sediments end up in water and begin to settle(Sedimentation)
Compaction
Then, it gets moved to different places on the Earth's surface such as oceans, seas, dams, lakes and rivers.
Cementation of the sediment to form rock
Most sedimentary rocks form in water, where the weight of the water presses down on the sediment and form layers of sedimentary rock(Compaction)
The sediment layers continue to form, with new layers forming on top of old layers. Sedimentary rocks continue to from all the time
Compaction and heat help form the sedimentary rock. Earth's geothermal energy helps create heat to form glue rock with salt crystals found in the sediment that glue the layers together.