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The Geology of Hong Kong (Interactive On-line)
Port Island Formation - Ki


Port Island Formation - Ki


Stratigraphy: Late Cretaceous post-volcanic sedimentary rocks.


Distribution: The Port Island Formation is only exposed on small islands in Mirs Bay including Port Island, Round Island, Channel Rock and Shek Ngau Chau.


Lithology: Reddish-brown thickly bedded conglomerate and sandstone, with thinly bedded reddish siltstone.


Depositional Environment: The sedimentary rocks of the Port Island Formation are interpreted as distal alluvial fan or proximal braidplain deposits.


Thickly-bedded volcanic conglomerate and sandstone

(Thickly-bedded volcanic conglomerate and sandstone of the Port Island Formation, Port Island)


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