Voranden (Bolivia)
| In front of Bolivia | ||
|---|---|---|
 Sierra de Manuque near Rurrenabaque |
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| location | Bolivia | |
| part of | To the | |
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| Coordinates | 18 ° 46 ′ S , 63 ° 28 ′ W | |
The Voranden in Bolivia , also called "ostbolivianisches Bergland", are a chain of low foothills, the eastern Andes are upstream chains and limit the Bolivian lowlands to the west, their average height is usually between 1000 and 1500 m. Geologically and tectonically they differ significantly from the actual cordillera of the Andes with the Altiplano .
Similar pre-Andean chains also exist in the other Andean countries in South America.
Mountain ranges in the west
The eastern Andes chain in Bolivia is essentially formed by the Cordillera Oriental in the north, the Cordillera Central in the middle and the Cordillera de Lípez in the southern part of Bolivia. They reach heights of over 6000 m, especially in the northern section of the high mountains. To the west they are bounded by the Bolivian Altiplano , a high mountain basin with no drainage and a mean altitude of almost 4000 m.
While parts of the Altiplano are densely populated, in the eastern Andes chain there is settlement mainly in the mountain valleys, which in large parts of the steep mountain valleys is only minor due to the mostly poor transport connections.
Lowlands in the east
The Bolivian lowlands in the east of the country are divided into the Llanos de Guarayos and the Moxos plain in the north, the Llanos de Chiquitos in the center and the Bolivian part of the Chaco in the south of the country. Its mean height is less than 200 m towards the Brazilian border in the east and is around 400 m in front of the Voranden chains.
The east of the Bolivian lowlands is mostly only sparsely populated, due to the poor accessibility, while the west in front of the Voranden chains is partially well developed and - especially around the metropolis of Santa Cruz - has a high population density in parts.
Ahead chains
- Voranden chains (from north to south) between the Peruvian border and the Santa Cruz area:
- Serrania del Tigre
- Serranía Cuñaca
- Serranía de Tutumo
- Serranía de Eslabon
- Serranía de Mamuque
- Serranía de Chepite
- Serranía de Hhuayra Pata
- Serranía Muchanes
- Serranía Marimonos (see also: Yungas )
- Serranía Eva Eva
- Serranía de Mosetenes
- Serranía Sejeruma
- Serranía de Callejas
- Serranía del Imajana
- Serranía de Iniricarsama
- Sierra Mataracú
- Voranden chains (from north to south) between the Santa Cruz area and the Argentine border:
- Serranía Siberia
- Serranía Racete
- Serranía Los Volcanes
- Serranía Loma Mansa
- Serranía Parabanon
- Serranía San Rafael
- Serranía Tambora
- Serranía Parabañon
- Serranía del Inca
- Serranía San Marcos
- Serranía Caipipendi
- Serranía Pirirenda
- Serranía Charagua
- Serranía Choreti
- Serranía Caro Huayco (also: Carohuaycho)
- Serranía Sararenda
- Serranía Aguaragüe
Transition from the eastern Andes to the Vorandes
Even if there is no clear demarcation, the geological properties of the real Andean chains and the Voranden can be distinguished quite well. The transition can be clearly seen, for example, in the region of the main valley ( Valle Central ) in the Tarija department . To the west of the capital, the foothills of the Andean chains (Cordillera de Sama) can be clearly seen, which demarcate the Altiplano at the Tajzara lagoons and reach heights of over 4,500 m. To the east of the city, the two mountain types initially seem to interlock, with the typically elongated ridges of the Voranden (here: Serranía Aguaragüe) with their wet forest vegetation and heights of mostly less than 2,500 m emerging more and more clearly in the east towards Entre Ríos . The popular photo opportunity Cañón de la Angostura , a river breakthrough ( Río Tarija ) through a ridge, which closes the Central Valley to the east, can be seen as a transition point. In the east of the Serranía Aguaragüe, the geology of the mountainous region is superimposed with the typical rock layers of the Chaco lowlands, so that the transition here is also fluid.