Retak Hill (), is one of the major hills shared between

Mukim Amo Mukim Amo is a mukim in Temburong District, Brunei. It has an area of ; the population was 2,144 in 2016. Name The mukim is named after Kampong Amo, one of the villages it encompasses. Geography The mukim is located in the eastern part ...

Temburong District Temburong District ( ms, Daerah Temburong; Jawi: دائيره تمبوروڠ) or simply Temburong () is the easternmost district in Brunei. It is an exclave — the land is separated from the rest of the country by Malaysia and Brunei Bay, an ...

Brunei Brunei ( , ), formally Brunei Darussalam ( ms, Negara Brunei Darussalam, Jawi alphabet, Jawi: , ), is a country located on the north coast of the island of Borneo in Southeast Asia. Apart from its South China Sea coast, it is completely sur ...

and

Limbang Division Limbang Division is one of the twelve administrative divisions of Sarawak, Malaysia. It has a total area of 7,788.50 square kilometres, and is the fourth largest division after Kapit Division, Miri Division and Bintulu Division. Limbang Divisio ...

Sarawak Sarawak (; ) is a States and federal territories of Malaysia, state of Malaysia. The largest among the 13 states, with an area almost equal to that of Peninsular Malaysia, Sarawak is located in northwest Borneo Island, and is bordered by the M ...

Malaysia Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...

Description

Retak Hill sits at the north of Pagon Hill with a height of , and remained one of the major hills in Brunei.

Montane forest Montane ecosystems are found on the slopes of mountains. The alpine climate in these regions strongly affects the ecosystem because temperatures fall as elevation increases, causing the ecosystem to stratify. This stratification is a crucial f ...

covers the hill, followed by the presence of

quartzite Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to tect ...

rocks In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition, and the way in which it is formed. Rocks form the Earth's ...

and metamorphosed siltstones.

History

A crucial expedition team was sent to the forests around Tembikai and Retak Hill in 1978. In the early 1980s, it was known that Netelia harmani

wasps A wasp is any insect of the narrow-waisted suborder Apocrita of the order Hymenoptera which is neither a bee nor an ant; this excludes the broad-waisted sawflies (Symphyta), which look somewhat like wasps, but are in a separate suborder. T ...

were found on the hill. Moreover,

Papilio acheron ''Papilio acheron'' is a species of butterfly in the family Papilionidae. It is endemic to East Malaysia. References * Gimenez Dixon, M. 1996.Papilio acheron 2006 IUCN Red List of Threatened Species. Downloaded on 31 July 2007. Endemic f ...

butterflies Butterflies are insects in the macrolepidopteran clade Rhopalocera from the Order (biology), order Lepidoptera, which also includes moths. Adult butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight. The ...

were also found on the mountain.

References

{{reflist Temburong District Mountains of Brunei

Bukit Pagon Pagon ( ms, Bukit Pagon) is the highest mountain in Brunei. It is situated on the border with Malaysia on the island of Borneo. Pagon Hill is located in the Temburong District of Brunei. This district is separated from the rest of Brunei by part ...

International mountains of Asia Brunei–Malaysia border