About Us

The Geology of Hong Kong (Interactive On-line)
Yim Tin Tsai Formation - Jty


Yim Tin Tsai Formation - Jty


Stratigraphy: Jurassic volcanic rocks with an age of approximately 164.5 ± 0.2 million years before present.


Distribution: The Yim Tin Tsai Formation is exposed mainly in the vicinity of Tolo Harbour, but isolated outcrops occur in the western New Territories, and on Lantau Island.


Lithology: The Yim Tin Tsai Formation is composed predominantly of lapilli-ash and lapilli-bearing coarse ash crystal tuff.


Coarse ash crystal tuff

(Coarse ash crystal tuff of the Yim Tin Tsai Formation, Yim Tin Tsai, northeastern New Territories)


Read more...