| 单词 | caldera |
| 释义 | caldera (once / 30306 pages) n A caldera is a crater formed after the eruption of a volcano. The caldera is formed when the volcano collapses into itself. Volcanoes are impressive forces of nature with the power to wreak enormous destruction when they erupt. One sign of that power is a caldera, which is a crater formed after a volcano has erupted and collapsed into itself. Some of the more ancient calderas formed mountains and valleys in the Rockies and elsewhere. A related word in English is cauldron, whose modern meaning (a vessel for hot liquids) can remind us of the molten lava of a volcano. WORD FAMILYcaldera: calderas USAGE EXAMPLESFederal officials said last week that the Valles Caldera National Preserve would become the 17th U.S. park unit with designated thermal features if approved. Seattle Times(Jan 02, 2017) Officials say Valles Caldera National Preserve would become the 17th park unit with designated thermal features. Washington Times(Jan 02, 2017) But now more than ever, the caldera demands attention: An eruption would be devastating to the 500,000 people living in and around it. Washington Post(Dec 21, 2016) n a large crater caused by the violent explosion of a volcano that collapses into a depression Hyper crater, volcanic crater a bowl-shaped geological formation at the top of a volcano |
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