Rainwater absorbs CO2 from the air to form a weak carbonic acid
this reacts with CaCO3 in rocks (eg chalk) to form calcium bicarbonate, which is easily DISSOLVED
cooler the temp of the rain water = the more co2 absorbed
SO carbonation is more effective in winter
in what season is carbonation more effective?
in winter
What is OXIDATION?
the reaction of rock minerals with oxygen (eg iron) to form a rusty red powder leaving rocks more vulnerable to weathering (aluminiun/iron based rocks)
what is SOLUTION?
= the dissolving of rock minerals, such as halite (rock salt)
