SVG Map of the Bluff Head Formation (DB), comprised of the oldest rocks in Hong Kong formed during the Devonian period.
I apologise the way Ma Shi Chau and the area east of Fung Wong Wat (?) are coloured triggers your OCD - those parts were actually formed during the Jurassic Period and were thus left uncoloured. ;)
This file was derived from: Map of Hong Kong.svg:
Map_of_Hong_Kong.svg: Joowwww *derivative work: Kayau