Kap Shui Mun
A north east trending fault crosses Ma Wan from the typhoon shelter on the west side to the Tun Wan. The island is separated from Lantau Island by a fault under the channel called the Kap Shui Mun Fault. This is angled to the North West, and has its direction controlled by the major tectonic zone it is in called the Linhua Shan Fault System that extends from the coast of Guangdong to Fujian.