Yan Chau () is an islet in the North District in the

New Territories The New Territories is one of the three main regions of Hong Kong, alongside Hong Kong Island and the Kowloon Peninsula. It makes up 86.2% of Hong Kong's territory, and contains around half of the population of Hong Kong. Historically, it ...

Hong Kong Hong Kong ( (US) or (UK); , ), officially the Hong Kong Special Administrative Region of the People's Republic of China ( abbr. Hong Kong SAR or HKSAR), is a city and special administrative region of China on the eastern Pearl River Delt ...

. It is located within

Double Haven Double Haven or Yan Chau Tong () is a harbour enclosed by Double Island, Crescent Island and Crooked Island within the north-eastern New Territories of Hong Kong. It is known for its scenery and natural environment, and for the calm seas from w ...

Conservation

Yan Chau is part of the

Double Haven Special Area Double Haven or Yan Chau Tong () is a harbour enclosed by Double Island, Crescent Island and Crooked Island within the north-eastern New Territories of Hong Kong. It is known for its scenery and natural environment, and for the calm seas from w ...

() that covers and was designated in 2011. The special area includes the islets

Pak Ka Chau Pak Ka Chau () is an islet of the North District of Hong Kong. It is located within Double Haven, south of Kat O. Conservation Pak Ka Chau is part of the Double Haven Special Area () that covers 0.8 hectare and was designated in 2011. The Special ...

, Yan Chau (both within Double Haven) as well as the islet of

Ap Lo Chun Ap Lo Chun () is a small island in the New Territories of Hong Kong. It is located in Ap Chau Bay () between Ap Chau () in the east and Sai Ap Chau in the west, with the islet of Ap Tan Pai () nearby in the northeast. It is under the administrati ...

and a part of

Ap Chau Ap Chau (), also known as Robinson Island, with a size of 0.04 km² is an island in the Crooked Harbour, in the north-eastern New Territories of Hong Kong. It is located in Ap Chau Bay (; Ap Chau Hoi). Islets located close by include ...

(both within

Crooked Harbour Crooked Harbour or Kat O Hoi () is a harbour at the northeast of New Territories, Hong Kong. The harbour is connected to Double Haven and the bigger sea of Mirs Bay. Crooked Island, also known as Kat O, and several islands, including Ap Chau, for ...

). The geology of the area is characterised by

sedimentary rock Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles ...

s of the

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ...

and

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ...

periods.

References

Islands of Hong Kong North District, Hong Kong {{NewTerritories-geo-stub