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The Phetchabun mountains (, , ) are a mountain massif in Phetchabun,
Phitsanulok Phitsanulok (, ) is a city municipality in northern Thailand and the capital of Phitsanulok province. It had a city population of 60,827 and an urban population of approximately 200,000 in 2024, making it Thailand's 19th-most populous city p ...
, Loei and Chaiyaphum Provinces,
Thailand Thailand, officially the Kingdom of Thailand and historically known as Siam (the official name until 1939), is a country in Southeast Asia on the Mainland Southeast Asia, Indochinese Peninsula. With a population of almost 66 million, it spa ...
. It consists of two parallel mountain chains, with the valley of the
Pa Sak River The Pa Sak River (, , Pronunciation is a river in central Thailand. The river originates in the Phetchabun Mountains, Dan Sai District, Loei Province, and passes through Phetchabun Province as the backbone of the province. It then passes throu ...
in the middle. The strange rock formations of Phu Hin Rong Kla and fields where the Siam tulip flower (''Curcuma alismatifolia''), known as ''dok krachiao'' (ดอกกระเจียว) in Thai, grows wild are some of the characteristics of the Phetchabun Mountains.


Geography

The mountain system as a whole is named after the city of Phetchabun which lies within the mountainous area. To the south and southeast lie the Dong Phaya Yen Mountains. Both sections of the Phetchabun massif are parallel and of a similar length, extending in a roughly north-south direction. The western range is a prolongation of the southern end of the Luang Prabang Range. The eastern range separates the broad
Chao Phraya The Chao Phraya River is the major river in Thailand, with its low alluvial plain forming the centre of the country. It flows through Bangkok and then into the Gulf of Thailand. Etymology Written evidence of the river being referred to by the ...
river basin of
central Thailand Central Thailand (Central Plain) (historically also known as Siam or Dvaravati) is one of the regions of Thailand, covering the broad alluvial plain of the Chao Phraya River. It is separated from northeast Thailand (Isan) by the Phetchabun Mount ...
from the
Khorat Plateau The Khorat Plateau (; ) is a plateau in the northeastern Thai region of Isan. The plateau forms a natural region, named after the short form of Nakhon Ratchasima, a historical barrier controlling access to and from the area. Geography The avera ...
of
Isan Northeast Thailand or Isan (Isan language, Isan/, ; ; also written as Isaan, Isarn, Issarn, Issan, Esan, or Esarn; from Pāli ''isāna'' or Sanskrit ईशान्य ''īśānya'' "northeast") consists of 20 provinces in northeastern Thai ...
. The northward-flowing
Loei River The Loei River (, , ) is the one of tributaries of the Mekong River. It originates at the western shore of the Phu Luang Wildlife Sanctuary, Phu Luang plateau, at first flowing southwards. Changing to an eastward direction it becomes the boundary ...
, a tributary of the
Mekong The Mekong or Mekong River ( , ) is a transboundary river in East Asia and Southeast Asia. It is the world's twelfth-longest river and the third-longest in Asia with an estimated length of and a drainage area of , discharging of wat ...
, has its sources in the eastern range. The southern limit of the Phetchabun massif is not clearly defined, roughly beginning south of the 16th parallel north where both ranges become a group of scattered mountains of lesser height, rarely surpassing 800 m, extending southwards. The eastern mountain chain is mentioned as the Phang Hoei Range in some geographical works, a name that encompasses the whole northern section of the Dong Phaya Yen mountain system, for Khao Phang Hoei is a 1,008 m high summit west of
Chaiyaphum Chaiyaphum (, ; , ) is a town ('' thesaban mueang'') in northeastern Thailand, capital of Chaiyaphum Province. it had a population of 58,350, and covers the full ''tambon'' Nai Mueang of Mueang Chaiyaphum District. Chaiyaphum is 337 road kilom ...
town, beyond the southern end of the Phetchabun Range proper in the northern Dong Phaya Yen. The highest elevation of the Phetchabun mountains is 1,794 m high Phu Thap Boek. Other important peaks are Khao Nam Ko Yai, Phu Kradueng, Phu Luang, Phu Ruea, and Phu Lom Lo.
Geologically Geology (). is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth s ...
, the mountains consist of
limestone Limestone is a type of carbonate rock, carbonate sedimentary rock which is the main source of the material Lime (material), lime. It is composed mostly of the minerals calcite and aragonite, which are different Polymorphism (materials science) ...
, interfused with
slate Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism. It is the finest-grained foliated metamorphic ro ...
and
sandstone Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sand ...
. A few
igneous rock Igneous rock ( ), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the cooling and solidification of magma or lava. The magma can be derived from partial ...
s are also found:
granite Granite ( ) is a coarse-grained (phanerite, phaneritic) intrusive rock, intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly coo ...
,
basalt Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial ...
and porphyry.


History

Historically the long mountainous system of the Phetchabun- Dong Phaya Yen- Sankamphaeng formed a barrier between Isan and the Central Plain. Until recently few roads crossed the system. During the period between 1968-1982 the area around 1,143 m high Khao Kho (เขาค้อ) and Phu Hin Rong Kla became an occasional battleground. At that time insurgents of the
Communist Party of Thailand The Communist Party of Thailand ( Abrv: CPT; , ) was a communist party in Thailand active from 1942 until the 1990s. The CPT was founded officially on 1 December 1942, although communist activism in the country began as early as 1927. In the 1 ...
established their base in hidden mountain locations and fought skirmishes against the
Thai Army The Royal Thai Army or RTA (; ) is the army of Thailand and the oldest and largest branch of the Royal Thai Armed Forces. History Origin The Royal Thai Army is responsible for protecting the kingdom's sovereignty. The army was formed in 187 ...
.


Protected areas

Several protected areas, including
national parks A national park is a nature park designated for conservation (ethic), conservation purposes because of unparalleled national natural, historic, or cultural significance. It is an area of natural, semi-natural, or developed land that is protecte ...
, forest parks and wildlife reserves are located in these mountains. In 2005 these were accepted by the
UNESCO The United Nations Educational, Scientific and Cultural Organization (UNESCO ) is a List of specialized agencies of the United Nations, specialized agency of the United Nations (UN) with the aim of promoting world peace and International secur ...
as a possible future addition to the
World Heritage World Heritage Sites are landmarks and areas with legal protection under an treaty, international treaty administered by UNESCO for having cultural, historical, or scientific significance. The sites are judged to contain "cultural and natural ...
list. Besides these protected areas, some forest parks are also located within the area of the range: *
Phu Hin Rong Kla National Park Phu Hin Rong Kla National Park (, ) is a national park located in the Loei Province, Loei and Phitsanulok Province, Phitsanulok Provinces of Thailand. The protected area is located in the forested mountains of the Luang Prabang Range close to the ...
* Namtok Chat Trakan National Park, * Nam Nao National Park * Phu Ruea National Park *
Phu Kradueng National Park Phu Kradueng National Park (), in the Si Than sub-district of Amphoe Phu Kradueng, Loei Province, is a national park in Thailand. It has a high point of 1,316 m (4318 ft) elevation at Khok Moei. It was proclaimed a national park on 2 ...
* Suan Hin Pha Ngam ParkSuan Hin Pha Ngam - Khunming
* Phu Pha Man National Park * Phu Luang Wildlife Sanctuary * Thung Salaeng Luang National Park * Tat Mok National Park, located at the boundary of the Phetchabun mountain range with the Dong Phaya Yen Mountains.


Gallery

File:Khek River in Wang Thong.jpg, The Khek River in Wang Thong District File:Border of Phetchabun.jpg, The heights of the range between Phetchabun and Phitsanulok File:Kho Mountain.jpg, Khao Kho Mountain File:Beautiful Khao Kho.JPG, Temple in Khao Kho District


References


External links

*
Thailand's National Parks - Royal Forest Department
*

{{Authority control Mountain ranges of Thailand Geography of Loei province Geography of Phitsanulok province Geography of Phetchabun province Geography of Chaiyaphum province Isan