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Cuicocha Volcano, Ecuador
The scenic lake-filled Cuicocha caldera is located at the southern foot of the sharp-peaked Pleistocene Cotacachi stratovolcano (top center) about 100 km north of Quito.
Farmer's fields encroach on the rim of the 3-km-wide caldera, which was created during a major explosive eruption about 3100 years ago.
Dacitic lava domes form two forested islands in the caldera lake.
Pyroclastic-flow deposits from the caldera-forming eruptions cover wide areas in now populated areas below the low-rimmed caldera.
The scenic lake-filled Cuicocha caldera is located at the southern foot of the sharp-peaked Pleistocene Cotacachi stratovolcano about 100 km north of Quito.
Both Cotacachi and Cuicocha were constructed along the Otavalo-Umpala fracture zone.
Eruptive activity at Cuicocha began about 4500 years ago and continued until about 1300 years ago.
The 3-km-wide, steep-walled caldera was created during a major explosive eruption about 3100 years ago that produced nearly 5 cu km of pyroclastic-flow and -fall deposits.
Cuicocha contains four intra-caldera lava domes that form two steep-sided forested islands in the 148-m-deep lake.
A pre-caldera Cuicocha lava dome is situated on the outer east side of the caldera.
Pyroclastic-flow deposits cover wide areas around the low-rimmed caldera, primarily to the east.
Gas emission continues from several locations in the caldera lake.
PHOTO SOURCE: Patricio Ramon, 2003 (Instituto Geofisca, Escuela Politecnica Nacional), courtesy of the Global Volcanism Program, Smithsonian National Museum of Natural History, used with permission.
NOTE: The information regarding Volcano on this page is re-published from other sources. No claims are made regarding the accuracy of Volcano information contained here. All suggestions for corrections of any errors about Volcano photos should be addressed to the copyright owner noted below the photo.
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This page was last modified 23-FEB-10
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