Stratigraphy: Cretaceous intrusive rocks with an age of approximately 143.7 ± 0.3 million years before present.

Distribution: The Chi Ma Wan Granite forms a subcircular pluton centred on the Chi Ma Wan Pennisular on the eastern side of Lantau Island.

Lithology: Equigranular medium-grained biotite granite.

(Equigranular, medium-grained Chi Ma Wan Granite, Cheung Chau)