submarine caldera的用法和樣例：
例句
- The mountain is encircled by the doughnut-shaped depression of the caldera.
山為環形的破火山口窪地環抱著。 - Daqiaowu uranium deposit oaurs in the contact Zone of quartz porphyry massif and explosive breccia chimney in the Mesozoic Mengshan caldera, belonging to porphyry type.
大橋塢斑岩型鈾礦床產於中生代蒙山破火山口中一石英斑岩體的內外接觸帶及其隱爆角礫岩筒中。
