Conical Volcan Arenal is the youngest stratovolcano in Costa Rica and one of its most active.
According to Volcano.und.edu the 1657-m-high andesitic volcano towers above the eastern shores of Lake Arenal, which has been enlarged by a hydroelectric project.
Arenal lies along a volcanic chain that has migrated to the NW from the late-Pleistocene Los Perdidos lava domes through the Pleistocene-to-Holocene Chato volcano, which contains a 500-m-wide, lake-filled summit crater.
The earliest known eruptions of Arenal took place about 7,000 years ago, and it was active concurrently with Cerro Chato until the activity of Chato ended about 3,500 years ago.
Growth of Arenal has been characterized by periodic major explosive eruptions at several-hundred-year intervals and periods of lava effusion that armor the cone.
To watch this three minute Costa Rica Volcano video, please click on the small black triangular Play button below.
All photos taken from http://www.arenal.net/arenal-volcano.htm
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Costa Rica Video – Arenal Volcano.
Article/Property ID Number 250
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