The Nevado El Cisne or Nevado del Cisne (), also known as Paramillo el Cisne or Paramillo del Cisne (), is a volcano in the

Central Ranges Central Ranges (code CER) is an Australian bioregion, with an area of 101,640.44 square kilometres (39,244 sq mi) spreading across two states and one territory: South Australia, Western Australia, and the Northern Territory.Andes The Andes ( ), Andes Mountains or Andean Mountain Range (; ) are the List of longest mountain chains on Earth, longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range ...

Colombia Colombia, officially the Republic of Colombia, is a country primarily located in South America with Insular region of Colombia, insular regions in North America. The Colombian mainland is bordered by the Caribbean Sea to the north, Venezuel ...

. Its summit is at an altitude of approximately . The mountain belongs to the Cisne-Morro Negro lava dome, a small volcanic complex near

Nevado del Ruiz Nevado del Ruiz (), also known as La Mesa de Herveo () is a volcano on the border of the departments of Caldas and Tolima in Colombia, being the highest point of both. It is located about west of the capital city Bogotá. It is a stratovolca ...

. Despite the ''nevado'' part of the name, indicating a permanently snow-capped mountain, the summit of El Cisne is now below the permanent snow line as a result of global warming, and it is no longer considered a true ''nevado''. Hence it is now commonly referred to as a ''paramillo''."Ruiz-Tolima Volcanic Massif", US Geological Survey
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Geology

Nevado El Cisne is the summit of a small volcanic complex which includes El Cisne's sister peak, Morro Negro, and several subpeaks. They are small stratovolcanoes. The complex has well-preserved morphology with barely eroded lava flows, suggesting recent volcanic activity. Five emission centers have been identified as generators of lava flows. The lava flows are andesitic and present notably smaller volumes compared to those observed in neighbouring volcanic complexes (Ruiz and Santa Isabel). The volcano is located over the

Palestina Fault The Palestina Fault () is a regional sinistral oblique thrust fault in the departments of Antioquia, Caldas and Bolívar in central Colombia. The fault has a total length of and runs along an average north-northeast to south-southwest strike of ...

, that crosscuts the underlying El Bosque Batholith of

Eocene The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes ...

age, dated at 49.1 ± 1.7 Ma.Plancha 225, 1998González, 2001, p.50

References

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* * Mountains of Colombia Volcanoes of Colombia Andean Volcanic Belt Quaternary Colombia Geography of Caldas Department Geography of Tolima Department Four-thousanders of the Andes Lava domes {{Colombia-geo-stub

Geology

See also

References

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