Features

• 1. Rainwater(a weak carbonic acid-water vapour mixed with carbon dioxide)falls onto exposed limetsone
• 2. It seeps into vertical cracks(joints)
• 3. It converts the calcium carbonate to calcium bicarbonate which dissolves
• 4. It widens the joints to form deep groves called grikes
• 5. The block that remains between the grikes are called clints