noun \kal-ˈder-ə, kl-, -ˈdir-\

Definition of CALDERA

:  a volcanic crater that has a diameter many times that of the vent and is formed by collapse of the central part of a volcano or by explosions of extraordinary violence

Origin of CALDERA

Spanish, literally, caldron, from Late Latin caldaria — more at cauldron
First Known Use: 1691

Other Geology Terms

anthracite, boulder, cwm, erratic, igneous, intrusive, mesa, sedimentary, silt, swale

Rhymes with CALDERA


noun    (Concise Encyclopedia)

Large, bowl-shaped volcanic depression that forms when the top of a volcanic cone collapses into the space left after magma is ejected during a violent volcanic eruption. The term is Spanish for “caldron.” Subsequent minor eruptions may build small cones on the floor of the caldera which may still later fill up with water; an example is Crater Lake in Oregon.


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