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Random pictures

Illustrated Volcano Glossary

caldera

Volcanology
View of the 13x8km large caldera of Santorini, Greece, formed during several Plinian eruptions including the Minoan eruption around 1613 BC.
View of the 13x8km large caldera of Santorini, Greece, formed during several Plinian eruptions including the Minoan eruption around 1613 BC.
Öraefajökull volcano, SE-Iceland. The summit caldera of this large, explosive volcano that erupted last in 1728, is occupied by a glacier, which is part of the Vatnajökull ice cap that covers most of SE Iceland.
Öraefajökull volcano, SE-Iceland. The summit caldera of this large, explosive volcano that erupted last in 1728, is occupied by a glacier, which is part of the Vatnajökull ice cap that covers most of SE Iceland.
Large crater, usually several kilometers across, formed by the collapse of the roof of a magma chamber emptied by large explosive eruptions.
A caldera is a large, usually circular depression at the summit of a volcano formed when magma is withdrawn or erupted from a shallow underground magma reservoir. The removal of large volumes of magma may result in loss of structural support for the overlying rock, thereby leading to collapse of the ground and formation of a large depression. Calderas are different from craters, which are smaller,... -> See whole entry

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crater - photoglossary.html

crater

Volcanology
Marum's crater on Ambrym volcano, containing a small lava lake.
Marum's crater on Ambrym volcano, containing a small lava lake.
A depression often on the top or the flanks of a volcano usually created by explosions of lava from the vent.

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caldera

 

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