volcanic island arc

基本解释

Its provenance is the Dawazi volcanic island-arc on the west side.
其物源主要来自其西侧的大凹子火山岛弧。
During late Late Cretaceous-Eocene, volcanic island arc moved eastward and the East China Sea shelf basin was turned into a back-arc basin.
晚白垩世晚期—始新世，火山岛弧向东移动，东海陆架盆地变为弧后盆地。
From the suture line towards the north, an andesite line along Sharburti Mountain was the volcanic island arc developed from middle Ordovician to middle-late Silurian.
由缝合线向北，沙尔布尔提山安山岩线是中奥陶世至中、晚志留世发育起来的火山岛弧。