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Copahue (Spanish pronunciation:) is a stratovolcano in the Andes on the border of Bío Bío Region, Chile and Neuquén Province, Argentina.There are nine volcanic craters along a 2 km (1.2 mi) line, the easternmost of which is historically the most active, and contains a 300 m (1000 ft) wide crater lake with a pH ranging between 0.18 and 0.30. [2]
The crater is almost a mile across and has its own micro climate. Sheltered from the winds that wet most of the rest of the island, figs and vines flourish at Rano Kau. [1] The inner slope was the site of the last toromiro tree in the wild until the specimen was chopped down for firewood in 1960. Crater lake of Rano Kau, with Orongo at far right
Crater Lake actually started as a mountain, Mount Mazama. A volcanic eruption roughly 7,700 years ago caused the mountain to collapse inward over time, forming a volcanic crater, the park says.
Following the eruption, thousands of fumaroles vented steam from the ash, creating the Valley of Ten Thousand Smokes. In 1919, geologists noted a lake covering a large part of the caldera floor. By 1923 the lake was gone and numerous fumaroles, mud pots, and a large mud geyser had replaced it. The lake has since refilled to a depth of over 800 ...
The crater was clearly changed by the eruption. A grey field of ash surrounds the crater and the caldera itself seems larger and deeper. The crater lake, which formed after Karthala's last eruption in 1991 and once dominated the caldera, is now gone completely. In its place were rough, dark grey rocks, possibly cooling lava or rubble from the ...
The Ukinrek maars (Central Yupik: Ukinrek [2]) are two volcanic craters on the north side of the Aleutian Range in Alaska that were formed by a phreatomagmatic eruption in 1977. The maars are 1.5 km south of Becharof Lake and 12 km northwest of Peulik Volcano, on a low area of the range, bordering the Bering Sea. The western of the two is ...
The crater lake of Mount Rinjani, Indonesia Lake Yeak Laom, Cambodia Baengnokdam crater lake of Hanla Mountain in winter, South Korea A volcanic crater lake is a lake in a crater that was formed by explosive activity or a collapse during a volcanic eruption .
Trou aux Cerfs (also known as Murr's Volcano) is a dormant, crater lake, cinder cone volcano with a well-defined cone and crater. It is 605 m (1,985 ft) high and located in Curepipe , Mauritius . The crater has been alternately described as 300 [ 1 ] and 350 meters in diameter, [ 2 ] and is 80 meters deep.