Hong Kong Geology Guide Book Geotechnical Engineering Office ...

Hong Kong Island, Shek O Headland, Tai Tau Chau
Introduction
20. Cretaceous Po Toi Granite
The Po Toi Granite crops out mainly on Po Toi Island, from where it is named, in the
area around the Stanley peninsula, and at Shek O in southeastern Hong Kong Island.
Po Toi Granite comprises both megacrystic coarse-grained granite, and equigranular
fine-grained biotite granite. Although the granite has not yet been accurately dated,
the geochemistry and field relationships suggest that it belongs to the youngest suite
of granites in Hong Kong, the Lion Rock Suite.
The difficulties of access to Po Toi Island and dense residential development on the
Stanley peninsula make both areas unsuitable for observing the Po Toi Granite.
Coastal outcrops around the Shek O headland and adjacent to Tai Tau Chau are more
accessible for studying Po Toi Granite, as not only does this locality have convenient
transport, but the granite outcrops are superb.
Access to the Shek O headland
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