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17:37 Aug 1, 2009
English to Danish translations [PRO]
Science - Geology
Additional field(s): Geography
English term or phrase: caldera
Definition from CENGAGE Learning:
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.

Example sentence(s):
  • Subsequent eruptions from the Long Valley magma chamber were confined within the caldera with extrusions of relatively hot (crystal-free) rhyolite 700,000 to 600,000 years ago as the caldera floor was upwarped to form the resurgent dome followed by extrusions of cooler, crystal-rich moat rhyolite at 200,000-year intervals (500,000, 300,000, and 100,000 years ago) in clockwise succession around the resurgent dome. USGS
  • Calderas tend to form after a series of large eruptions. Usually a new volcano starts to grow inside, eventually covering it. Geology
  • Over the course of several hundred years following the creation of the caldera, rain and snow filled the basin to a depth of 1,943 feet (592 meters). Crater Lake today is the nation’s deepest lake. Crater lake
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Summary of translations provided
1eksplosionskrater med calderadannelse

Discussion entries: 1


Translations offered

330 days   confidence: Answerer confidence 1/5Answerer confidence 1/5
eksplosionskrater med calderadannelse

Definition from Henning Andersen Danmark:
Der opbygges altså et overtryk i disse magmabeholdere eller kamre under vulkanerne langs disse subduktionszoner - underskydningszoner - eller destruktionszoner, og resultatet er derfor meget eksplosive vulkanudbrud, der ofte ender med calderadannelse i forbindelse med de stærke eksplosioner og askestrømme eller glødende askelaviner af de undvigne gasser fra den smeltede lava.

Example sentence(s):
  • Den første calderadannelse finder sted, da Thera vulkanen kollapser som vist på figur d. - geologerne Danmark  
  • Ved meget voldsomme, såkaldt paroxysmale udbrud kan vulkanen udkaste så meget materiale fra magmakammeret, at vulkanbygningen pga. manglende understøtning styrter sammen, og der dannes en caldera, som kan være mere end 5 km i diameter. - Den Store Danske Danmark  
  • Hvis grundvand eller havvand trænger ind i vulkanbygningen og derved kommer i direkte kontakt med magmaet, fx i forbindelse med calderadannelse, vil der ske en voldsom dampeksplosion, og man taler om et phreatisk udbrud. - Den Store Danske Danmark  

Ringstrukturerne forklares gennem en eller anden form for extrusion, hvad enten der kan være tale om enkel vulkanisme, kombineret med gasextrusion (calderadannelse), eksplosionskratre (maarer), eller extrusion af fast materiale ved andre processer (f. ex. is).
Dansk Geologisk Forening -
Local time: 04:22
Native speaker of: Native in EnglishEnglish
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