What are the characteristics of weathering

Weathering can not only alter the rock physically, but it can also alter the rounded rock chemically depending on the material by which it is made of. Biological weathering can always weather away a rock without depending on its shape or size. There are other forms of weathering also that can impact the rounded rock. 

Two kinds of weathering mostly affect the rocks. and they are physical weathering and chemical weathering. The above mentioned two rocks are highly affected by carbonic acid. The appeareance of these kind of rocks change their structure due to erosion very regularly. Caronation is the type of chemical weathering that affects the rocks limestone and marble. The carbonic acide is formed by the reaction of carbon dioxide in the air and water in the rivers. This carbonic acid results in weathering.