volcanic island arc

基本解释

Its provenance is the Dawazi volcanic island-arc on the west side.
其物源主要來自其西側的大凹子火山島弧。
During late Late Cretaceous-Eocene, volcanic island arc moved eastward and the East China Sea shelf basin was turned into a back-arc basin.
晚白堊世晚期—始新世，火山島弧曏東移動，東海陸架盆地變爲弧後盆地。
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.
由縫郃線曏北，沙爾佈爾提山安山巖線是中奧陶世至中、晚志畱世發育起來的火山島弧。