Platanar Volcano
From Wikipedia, the free encyclopedia
Platanar Volcano is located in the Cordillera Central mountain range. It is part of a complex that covers 900 square kilometres (220,000 acres) and is dominated by Porvenir Volcano at 2,267 m (7,438 ft). It is located within the Juan Castro Blanco National Park.
| Platanar Volcano | |
|---|---|
_Quesada,_Alajuela,_Costa_Rica.jpg) | |
| Highest point | |
| Elevation | 2,183 metres (7,162 ft) |
| Coordinates | 10°18′00″N 84°21′58″W[1] |
| Geography | |
  Platanar Volcano Costa Rica | |
| Geology | |
| Age of rock | Holocene |
| Mountain type | Volcano |
| Last eruption | Unknown |
It has a destroyed crater to the northwest.[2] Prehistoric lava flows on its western flank;[1] one of them, the so-called Florida flow, was perhaps created by Platanar's most recent activity. Cerro Porvenir has a truncated caldera at the summit with a cone inside.[2] Both of these are part of a composed stratovolcano of Upper Pleistocene age that on Platanar's side overlies the remains of Palmera's collapsed caldera, of probable late Pleistocene age.[3] Platanar has erupted lavas ranging from basalts to andesites in composition.[2]
The western flanks of both volcanoes are used for dairy farming.[4] In 1968 2,500 hectares (6,200 acres) on Cerro Platanar were converted into a National Forest.[5]
On 30 March 1997 there were six earthquakes on the south flank, the strongest being of magnitude 2.7. A previous seismic swarm in April 1980 had lasted for 2–3 weeks.[6]
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