(i) Stack in Cheung Chau(refer to attachment 7)
The stack in Cheung Chau is called ' Man Tou Rock' because its shape is oval and the surface is smooth. “It is also very small in size, which does not seem like joined to the headland originally. This means that the stack has undergone prolonged weathering and erosion. Destructive wave causes solution and attrition, which tends to round of the angular boundaries of rock. Temperature changes also cause block disintegration, causes the rock to reduce in size.” Sources:(http://www.qc.edu.hk/it-school/homepage/geog/cheung%20chau/web/phy.htm)
(ii) Stacks in Ping Chau(refer to attachment 8)
There are two famous stacks at Kang Lau Shek, about 6m tall each. The one stack at Chum Kang Chau was cut off from the mainland, but according to the information we found, it has now been joined to the land by deposition.
