Weathering
  North Stradbroke Island, QLD., Australia
Weathering of all rock types can be due to 
  • the action of water (rain, waves, running water)
  • the action of the wind
  • the action of chemicals dissolved in water
  • the action of ice
Here are some examples.
A river carves its way to the sea: New Zealand 1985
A statue in the Stadt Park , Hamburg