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The Geology of Hong Kong (Interactive On-line)
High Island Formation - Kkh

High Island Formation - Kkh

Stratigraphy: Early Cretaceous volcanic rocks with ages of approximately 140.9 ± 0.2 million years before present.

Distribution: The High Island Formation crops out in the Sai Kung and Clear Water Bay districts in eastern New Territories.

Lithology: Dominantly welded fine ash vitric tuff with minor tuff breccia and tuffaceous sandstone.

Columnar-jointing in the High Island Formation

(Columnar-jointing in the High Island Formation, North Nine Pin Island)