Kravanh Mountains
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| Kravanh Mountains | |
|---|---|
| ជួរភ្នំក្រវាញ (Chuŏr Phnum Krâvanh) | |
| Geography | |
| Type | Mountain range |
| Country | Cambodia |
| Provinces | Koh Kong |
| Coordinates | 11.500000, 103.500000 |
| Borders | Thailand (northwest), Gulf of Thailand (southwest) |
| Elevation | 1,813 m (Phnom Aural) |
| Length | ~160 km |
| Area | ~20,000 km² |
| Rock Type | Granitic plutons, metamorphic basement |
| Age | Late Cretaceous (~75–98 Ma) |
| Notes | Gem-bearing pegmatites in associated plutons |
| Growing Region | Southern Cambodia |
| Growing Area | Cardamom Mountains |
The Kravanh Mountains (Khmer: ជួរភ្នំក្រវាញ, Chuŏr Phnum Krâvanh; Thai: ทิวเขาบรรทัด, Thio Khao Banthat), commonly known in English as the Cardamom Mountains, are a major mountain range in southwestern Cambodia extending into eastern Thailand. The range runs along a northwest-southeast axis from Chanthaburi Province in Thailand through Koh Kong, Pursat and Kampong Speu provinces in Cambodia, connecting to the Damrei Mountains (Elephant Mountains) to the southeast.[1] The silhouette of the range appears in the provincial seal of Trat Province in Thailand.[2]
The highest point, Phnom Aural (1,813 m), is Cambodia's tallest peak. The total extent of the range covers roughly 20,000 km², though the broader ecoregion including foothills and lowlands extends to about 44,000 km².[2]
Not to be confused with Cardamom Mountains, the landrace cannabis growing area page documenting cannabis cultivation across the range.
Geography
The Kravanh Mountains occupy the western quarter of Cambodia, falling broadly between 10°50' N to 12°45' N latitude and 102°30' E to 104° E longitude. The range forms a discontinuous chain that connects to the Damrei Mountains to the southeast. To the southwest it borders the Gulf of Thailand through a narrow coastal plain; to the northwest lies the international boundary with Thailand; to the east and north it transitions into the lowland plains of the Tonle Sap basin.[1][2]
The topography consists of steep escarpments rising abruptly from near sea level on the southwestern coastal plain to over 1,500 m, with deeply incised valleys and pronounced ridges. Several peaks exceed 1,350 m: Phnom Aural (1,813 m) in the east, Phnom Samkos (1,717 m) in the northwest and Tumbol Hill (1,563 m) near the Thai border. The Thai portion of the range comprises heavily eroded and dispersed mountain fragments including the Khao Sa Bap, Khao Soi Dao and Chamao-Wong Mountains.[1][2]
The range forms a major watershed, with rivers draining southwestward toward the Gulf of Thailand rather than into the Mekong system. Dense tropical rain forest prevails on the windward western slopes, which receive 3,000–5,000 mm of rainfall annually, with some localised areas exceeding 5,000 mm due to orographic effects. The eastern slopes in the rain shadow receive only 1,000–1,500 mm. Cardamoms and pepper have been commercially grown on the range's slopes.[1]
Geology
The Kravanh Mountains are composed primarily of granitic plutons and associated metamorphic rocks formed during the Late Cretaceous period, approximately 75 to 98 million years ago, as part of broader Indochinese magmatism and tectonism. These igneous and metamorphic foundations create impermeable bedrock fostering steep, erosion-prone slopes that produce the range's dramatic relief. Overlying sandstone and alluvial deposits occur in places.[2]
The Cenozoic exhumation and earlier Mesozoic uplift events that elevated the range are part of broader tectonic deformation within the Indochina block. Karst outcrops and steep escarpments occur locally.[2]
The same Late Cretaceous geological processes produced the Bayong Kor pluton (~86 Ma) in Takeo province, where gem-bearing miarolitic pegmatites containing topaz, aquamarine, smoky quartz, fluorite and tourmaline have been documented by the Canadian Museum of Nature.[3]
Ecology
The Kravanh Mountains are the core of the Cardamom Mountains rain forests ecoregion, one of the largest remaining areas of intact tropical moist broadleaf forest in mainland Southeast Asia. Separated from other regional rainforests by the Khorat Plateau to the north, the range hosts several endemic species and serves as a refuge for species endangered elsewhere. The Vietnamese island of Phu Quoc off the Cambodian coast has similar vegetation and is included in the ecoregion.[2]
Distinct vegetation zones correspond to elevation gradients: lowland evergreen forest at lower elevations, thick montane cloud forest above 700 m and dwarf conifer forests (Dacrydium elatum) on the southern slopes of the Damrei Mountains. Riparian corridors host dense gallery forests, and seasonal wetlands and coastal transition zones feed tributaries flowing to the Gulf of Thailand.[2]
The range shelters at least 62 globally threatened animal species and 17 globally threatened trees. Among mammals, the mountains host the largest population of Asian elephant in Cambodia and possibly all of Indochina. Other species include fourteen endangered mammal species: Indochinese tiger, clouded leopard (Pardofelis nebulosa), dhole (Cuon alpinus), gaur (Bos gaurus), banteng (Bos javanicus), Malayan sun bear and the large Indian civet.[2]
Pearic-speaking indigenous communities historically occupied the foothills, maintaining forest-based livelihoods and retaining distinctive languages and ecological knowledge. These communities traded forest products, including wood and resin, with lowland and coastal populations.[2]
Conservation areas
Large portions of the Kravanh Mountains are incorporated into government-declared protected areas managed under coordination between Cambodia's Ministry of Environment, provincial authorities and international conservation organisations. Key protected areas include the Cardamom Mountains Wildlife Sanctuary and the Central Cardamom Protected Forest.[2]
A transborder highway completed in 2002 south of the range along the coast fragmented habitats for large mammals and opened areas to slash-and-burn agriculture and poaching.[2]
Archaeology
The mountains hold historic sites and relics dating from the 15th to 17th centuries. Jar burials scattered across remote natural rock ledges contain 60 cm exotic ceramic jars and rough-hewn log coffins. The jars represent a previously unrecorded burial practice in Khmer cultural history; local legends suggest the remains are those of Cambodian royalty. Glass beads of various colours and composition found with the remains were common products in maritime trade between nearby countries, likely obtained by mountain communities through exchange of forest products.[2]
A rock art cave site known as Kanam depicts ancient elephants, elephant riders, deer and wild cattle (or buffalo) in red ochre paint.[2]
Khmer Rouge
The inaccessibility of the Kravanh Mountains made the range one of the last strongholds of the Khmer Rouge after Vietnamese forces toppled the regime in Phnom Penh in 1979. The border with Thailand in the west served as a conduit for foreign support of, and eventually a sanctuary for, fleeing Khmer Rouge fighters and refugees. The conflict period displaced populations and disrupted traditional land use patterns across the range, while simultaneously contributing to the preservation of the forest by limiting development and exploitation.[2]
Cannabis
Main article: Cardamom Mountains
The Kravanh Mountains and their southeastern extension, the Damrei Mountains, formed the primary corridor for commercial cannabis cultivation in Cambodia during the 1990s and early 2000s. For documentation of cannabis cultivation history, growing practices and conservation status, see the dedicated growing area page: Cardamom Mountains.
Naming
Krâvanh (ក្រវាញ) is the Khmer word for cardamom, the spice that has been commercially grown on the range's slopes. The English name "Cardamom Mountains" is a direct translation. In Thai, the range is known as ทิวเขาบรรทัด (Thio Khao Banthat). The Khmer prefix Chuŏr Phnum (ជួរភ្នំ) means "mountain range."
See Also
References
- ↑ 1.0 1.1 1.2 1.3 Encyclopaedia Britannica. "Krâvanh Mountains." [1]
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 Wikipedia. "Cardamom Mountains." [2]
- ↑ Piilonen, Paula C., et al. "The Mineralogy of the Gem-Bearing Miarolitic Pegmatites And Hydrothermal Veins At Phnom Bayong, Kirivong, Takeo Province, Cambodia." Rocks & Minerals, 98 (4), 2023, pp. 310–327.