large, steep-sided circular depression resulting from the explosion and subsidence of a stratovolcano

A large, bowl-shaped crater associated with a volcanic vent. A caldera can form from a volcanic blast or the collapse of a volcanic cone into an emptied magma chamber.

A large volcanic depression at the summit of a volcano, caused by collapse or explosion.

A topo-volcanographical feature, usually greater that 1.5 miles in diameter, which is formed when the top of a volcanic cone collapses downward into the volcanic cone. Caldera will usually fill with water, creating fourmations known as caldera lakes, often featuring a small island which is theremains of a subsequent lava dome. An example of such a lake is Crater Lake in the state of Oregon (USA).

A large, more or less circular depression or basin associated with a volcanic vent. Its diameter is many times greater than that of the included vents. Calderas are believed to result from subsidence (or collapse) and may or may not be related to explosive eruptions.

A depression formed at the summit of a volcano, caused by explosion outward or collapse inward.

A volcanic crater greater than 1.5km formed by subsidence below the volcano.

A depression in the summit of a volcano (usually greater than 1 kilometer across) caused by subsidence into a magma chamber.

A large, steep-sided, circular or oval volcanic depression usually formed by summit collapse resulting from partial draining of the underlying magma chamber.

a pit with steep sides at the top of the volcano that has a diameter at least three times its depth.

A large crater formed by collapse or subsidence of the ground surface following a great eruption. During a typical caldera-forming eruption, the magma chamber is partially emptied and large amounts of ash and pyroclastic debris are extruded.

A big crater or pit that forms when a volcano erupts or when the top of the volcano collapses.

Large volcanic crater created by explosion or internal collapse of a volcanic cone.

A large volcanic depression containing volcanic vents.

A large, bowl-shaped volcanic depression formed by the collapse of a volcano due to rapid removal of voluminous magma from underneath the mountain. The caldera have a diameter many times greater than that of the original crater.

a large, roughly circular depression usually caused by volcanic collapse or explosion

a large crater caused by the violent explosion of a volcano that collapses into a depression

a circular shaped landform depression caused by the eruption of a large, near surface body of magma

a circular to elliptical collapse feature on a volcano

a crater more than a mile across

a depression similar to Crater Lake but without water

a huge crater at the top of a volcano

a huge depression caused when a large volume of magma is removed from beneath a volcano, and the ground subsides or collapses i to the empty space

a lake or pond formed at the top of a sealed volcano

a large, basin-shaped volcanic depression, more or less circular and has a diameter which is many times greater than that of the included vent or vents held within it

a large basin shaped volcanic depression that is formed by the collapse of a volcano, the collapse of the magma hamber underneath the volcano, or a huge catastrophic eruption where a volcano blows itself to bits

a large bowl-shaped crater that is formed by the collapse of a volcanic cone after an eruption

a large crater formed by volcanic explosion or by the collapse of a volcanic cone

a large feature, usually more than a kilometer in diameter, which forms by slow successive collapse of the top of the volcano when magma is withdrawn from the magma chamber below

a large, usually circular depression at the summit of a volcano formed when magma is withdrawn or erupted from a shallow underground magma reservoir

an underwater crater

a round or oval shaped low-lying area that forms when the ground collapses after an eruption

a round or oval-shaped low-lying area that forms when the ground collapses because of explosive eruptions

a very large volcanic crater

a volcanic crater that has a diameter several times that of the vent and is formed by the collapse of the central portion of the volcano

a volcanic crater which usually has a flat surface at the bottom, formed by a volcano collapsing into itself, usually because of low pressure in the magma chamber below or because of a violent eruption

A huge bowl-shaped crater, often kilometres across, formed by collapse into the magma chamber or by explosive volcanic eruptions.

(cahl-DEHR-ah) Spanish Caldron—a volcano that has collapsed upon itself.

A large, circular depression in a volcanic area formed by eruption or collapse.

A large volcanic crater, that usually covers an area greater than the vents within it.

a large depression, usually circular or oval shaped, left behind when a volcano's summit collapses.

A large depression formed at the top of a volcano when the vent collapses.

A large depression generated by the collapse of a volcanic edifice into its magma chamber. Transfer of magma from the chamber to the surface causes the edifice to founder, either as a coherent piston or chaotically as a jumble of blocks. Some calderas form due to prolonged eruption of basaltic lava, like on Hawaii. The world's largest calderas form during explosive eruptions and can be several tens of kilometres wide and up to two or more km deep. For example, the great caldera of Lake Toba in Sumatra is 100x30km. It formed by collapse associated with more than one ignimbrite eruption, the last of which was about 75,000 years ago. Some small calderas are only a few km across. The composite caldera of Santorini is 6x8km and extends to 400m below sea level. It formed as a result of at least four explosive eruptions during the last 200,000 years.

A large, basin-shaped depression formed by the inward collapse of a volcano after or during an eruption ( movie).

a large crater formed by a volcanic explosion

The Spanish word for cauldron, a basin-shaped volcanic depression; by definition, at least a mile in diameter. Such large depressions are typically formed by the subsidence of volcanoes. Crater Lake occupies the best-known caldera in the Cascades.

Large, generally circular, fault-bounded depression caused by the withdrawal of magma from below a volcano or volcanoes. Commonly, the magma erupts explosively as from a giant volcano and, falling back to Earth as volcanic ash, fills the caldera so formed.

A large volcanic depression, commonly circular or elliptical when seen from above.

A big (greater than one mile across), usually circular depression caused by the collapse of solid rock after the magma underneath it is withdrawn during an eruption.

A large volcanic crater, usually formed by collapse of the volcano during large eruptions. Calderas can be kilometers or tens of kilometers across with steep cliffs up to a kilometer high.

a large, basin-shaped volcanic depression; typically formed by the collapse of the central part of a volcano or by explosions of extraordinary violence.

A depression formed at the summit of a volcano caused by collapse when magma is removed from the reservoir below.

A large, basin-shaped volcanic depression, more or less circular in form, the diameter of which is many times greater than that of the included vent or vents, no matter what the steepness of the walls or form of the floor.

crater formed by an explosion or collapse of a volcanic vent. coma the dust and gas surrounding an active comet's nucleus

Volcanic feature. A large basin-shaped volcanic depression, somewhat circular, with a diameter that is many times greater than the diameter of the vent or vents that fed it from below. Crater Lake in Oregon is a classic example.

A large, basin-shaped volcanic depression, more or less circular in form, and having a diameter many times greater than the included volcanic vents. See also crater.

large, bowl-shaped volcanic depression that is wider than it is long

n. A large circular volcanic depression, often originating due to collapse.

A caldera is a large depression at the top of a volcano, caused by collapse or explosion.

a bowl-shaped landform, created either by a huge volcanic explosion (which destroys the top of a volcano) or by the collapse of a volcano's top.

a roughly circular depression near the summit of a volcano.

A vast depression at the top of a volcanic cone, formed when an eruption substantially empties the reservoir of magma beneath the cone's summit. Eventually the summit collapses inward, creating a caldera. A caldera may be more than 15 kilometers in diameter and more than 1000 meters deep.

a large, more or less circular, more-than-a-mile-in-diameter depression formed either by collapse or by explosion, usually at the summit of a volcano

A large volcanic depression, generally circular in form.

A large volcanic depression up to 50 km across, formed by collapse during and after an eruption. The northern part of Lake Taupo is a caldera.

A large, basin-shaped volcanic depression that is more or less circular in form. Most volcanic calderas are produced by collapse of the roof of a magma chamber due to removal of magma by voluminous eruptions or subterranean withdrawal of the magma, although some calderas may be formed by explosive removal of the upper part of a volcano.

A large volcanic crater produced by the collapse of underground lava reservoirs.

A large circular depression in a volcano.

A large, bowl-shaped volcanic depression with a diameter many times greater than the included volcanic vent or vents. It may be formed by explosion or collapse.

Resurgent Caldera Eruptions

A caldera is a large depression formed from a collapsed volcano. Calderas are often circular or elliptical.

A caldera is a volcanic feature formed by the collapse of a volcano into itself, making it a small, special form of volcanic crater. The word 'caldera' comes from a Spanish word meaning "cauldron".