• WordNet 3.6
    • n caldera a large crater caused by the violent explosion of a volcano that collapses into a depression
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Century Dictionary and Cyclopedia
    • n caldera A large kettle or caldron; hence, in geology, an amphitheatrical depression in a volcanic formation. The term was originally used in describing volcanic regions occurring where Spanish is the current language, and was introduced by Von Buch in his classic description of the Canaries. Its use has been extended thence to other countries, and by it is understood a large amphitheatrical or kettle-like depression occurring in volcanic rocks, surrounded by high and steep walls, which are usually more or less broken away on one side or cut through by deep ravines (barrancas). Calderas are generally admitted to be volcanic craters enlarged by the action of the sea after submergence of the mass, or by the action of subterranean disruptive forces.
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In literature:

Already by now we have a network of strategy clutching with invisible fingers at the throat of the tyrant Calderas.
"Rolling Stones" by O. Henry
At six o'clock we came to anchor at Caldera, in seven fathoms water.
"The Former Philippines thru Foreign Eyes" by Tomás de Comyn
Caldera, in Chili, musical sounds under water, 383.
"Sketches of the Natural History of Ceylon" by J. Emerson Tennent
This province has five ports, at Juncal, Chineral, Caldera, Copaipo, and Huasca, or Guasco.
"A General History and Collection of Voyages and Travels, Vol. 5" by Robert Kerr
Among the most frequented of these are Valparaiso, Coquimbo, Caldera, Iquique and Arica.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 2" by Various
The term caldera is often applied to bowl-shaped craters in Spanish-speaking countries.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6" by Various
For long hours the "Caldera" remained the plaything of this fearful wind.
"A Lady's Captivity among Chinese Pirates in the Chinese Seas" by Fanny Loviot
There are three known causes or modes of operation, which may have conduced towards the vast size of the Caldera.
"A Manual of Elementary Geology" by Charles Lyell
You and Mr. Caldera almost ruined him in that acreage affair.
"The Streets of Ascalon" by Robert W. Chambers
At six o'clock we came to anchor at Caldera, in seven fathoms water.
"The Philippine Islands, 1493-1898" by Various

In news:

At the beginning of 2010, KSB Group of Mexico received the order to equip La Caldera pumping station in Mexico City with 24 large wastewater pumps.
Salt Water Taffy : Caldera's Revenge, part 2.
5 of Matt Loux's Salt Water Taffy wraps up the Caldera's Revenge saga.
They are 17-year-old Richard Calderas and 16-year-old Rene Calderas.
Scientists think the volcano emptied its magma chamber during eruptions, and, as the lava ran out onto the surface, the volcano collapsed, forming a large caldera.
Prison officials identified the inmates as former Springfield resident Michael Paul Jones and former Eugene resident Roger Caldera Vigueria.
Ransom Love, Co-founder of Caldera and SCO, Speaks of Unix , GPL and the Lawsuit.
In 2001, one died after falling off a 985-foot-high caldera rim, and in 2005, four Filipino researchers died in a chopper crash while inspecting landslide areas.
Caldera Systems Inc.'s new Linux management package, Caldera Volution , is a good first step toward centralized administration of Linux systems.
Caldera Volution Good Start for Taming Linux.
Caldera Fest concocts artful stew.
The lava lake swirling beneath a crack in the earth at Halemaumau crater — Kilauea volcano's summit caldera — is hitting its highest levels since the vent opened in 2008, according to the US Geological Survey's Hawaiian Volcano Observatory.
Pete Caldera, at the club Swing 46 in Manhattan, is a reporter covering the Yankees, but croons Ol' Blue Eyes tunes in his free time.
In this photo taken Nov 25, 2012, Aucas soccer fans celebrate their team's return to Ecuador 's professional league Division B, at La Caldera Del Sur stadium in Quito.
In this Nov 25, 2012 photo, Aucas soccer fans hold up a giant team banner before the start of a match at La Caldera Del Sur stadium in Quito, Ecuador .

In science:

The observatory on La Palma lies close to the island’s peak, on the rim of a large volcanic caldera, at longitude 18o W, latitude 29o N, altitude 2300 m, geomagnetic latitude ≈ 20o N.
LA Palma Night-Sky Brightness