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The Geology of Hong Kong (Interactive On-line)
Bluff Head Formation - Db


Bluff Head Formation - Db


Stratigraphy: Devonian sedimentary rock with an age ranging from 417 to 354 million years before present - the oldest rock outcrops in Hong Kong.


Distribution: The Bluff Head Formation is present from Bluff Head to Harbour Island, Ma Shi Chau and Ma On Shan areas, northeastern New Territories.


Lithology:


The Bluff Head Formation consists of pale grey, fine- to coarse-grained quartz sandstone and reddish brown purple siltstone with greyish white, quartz-pebble conglomerate.

Depositional Environment: The majority of the Bluff Head Formation represents the deposits of fluvial channels. Minor facies include sheet flood, aeolian, paleosol and deltaic facies associations.


Quartz-pebble conglomerate of the Bluff Head Formation

(Quartz-pebble conglomerate of the Bluff Head Formation at Fung Wong Wat, Tolo Channel, northeastern New Territories)


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