One of the well-known solution weathering processes is carbonate dissolution, the process in which atmospheric carbon dioxide leads to solution weathering. Carbonate dissolution affects rocks containing calcium carbonate, such as limestone and chalk. This takes place when rain combines with carbon dioxide to form carbonic acid, a weak acid, which dissolves calcium carbonate (limestone) and forms soluble calcium bicarbonate. Despite a slower reaction kinetics, this process is thermodynamically favored at low temperature, because colder water holds more dissolved carbon dioxide gas (retrograde solubility of gases). Carbonate dissolution is therefore an important feature of glacial weathering.