What are the types of weathering?

Weathering is defined as mechanical disintegration and chemical decomposition of rocks through the actions of various elements of weather and climate.There are three major groups of weathering processes : 

• Chemical; 
• Physical or mechanical; 
• Biological weathering processes. 

Very rarely does any one of these processes ever operate completely by itself, but quite often a dominance of one process can be seen.

Further Reading:

• Chemical Weathering 
• Weathering