Glossary entry (derived from question below)
English term or phrase:
caldera
Japanese translation:
カルデラ
Oct 11, 2008 02:54
15 yrs ago
English term
caldera
GBK
English to Japanese
Science
Geology
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 sentences:
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. (About.com: 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)
Change log
Oct 11, 2008 02:54: changed "Stage" from "Preparation" to "Submission"
Oct 14, 2008 02:54: changed "Stage" from "Submission" to "Selection"
Oct 21, 2008 11:54: changed "Stage" from "Selection" to "Completion"
Proposed translations
+2
10 hrs
Selected
カルデラ
Definition from
日本地質学会:
カルデラとは，ポルトガル語で「大鍋」の意味を持ち，火山に見られる巨大な凹みである．巨大とは概ね直径2km以上のものを指す．隕石が衝突してできたクレーターとは明瞭に区別される．地下からマグマが一斉に噴出することで，地表が陥没するものを「陥没カルデラ」と呼ぶ．巨大噴火でできるカルデラは，陥没カルデラであることが多い．言い換えれば，カルデラの存在は，火山が過去に巨大噴火を起こしたことの証明である．
Example sentences:
頂上部に直径約 3.5kmの外側カルデラがあり、その内側には2000年噴火により生じた直径1.6kmのカルデラがある。 (気象庁（三宅島について）)
洞爺カルデラは約10万年前の最終間氷期に数回の噴火を経て形成された。 (Wikipedia)
4 KudoZ points awarded for this answer.
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