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Rock is soil compacted and changed physically and chemically over thousands of years. The changes are due to temperature, pressure and various chemicals in the area that process is taking place.
Physically/mechanically formed sedimentary rock, organically/biologically formed sedimentary rock, and chemically formed sedimentary rock.
rainfall and temperature
It is compacted and cemented by minerals.
If the rock is a limestone it will react with it chemically.
Chemically formed sedimentary rock
YES.
A rock will breakdown physically into some type of sediment. Sediments such as: dirt, clay, sand, and pebbles. They can also breakdown chemically in solution.
Carbonation. Minerals combine chemically with H2CO3 and form a new product called...Carbonation. Which happens inside the rock :)
Chemical
rock salt
Yes, they can be eroded chemically and mechanically.