Cerro Arenales is an isolated stratovolcano in southern Chile, located in the Northern Patagonian Ice Field 140 km SSW of Hudson volcano and 195 km north of Lautaro volcano.
The volcano was recognized as a volcano during a 1963 expedition traversing the Northern Patagonian Ice Field led by Eric Shiptononly.
The only known eruption was in early 1979 and was detected by a small tephra deposit observed blanketing the icecap on the SW flank on a satellite image from 8 March 1979.
Note: an active volcano with a similar name Arenal is located in Costa Rica.
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