volcanic island arc

基本解釋

Its provenance is the Dawazi volcanic island-arc on the west side.
其物源主要來自其西側(cè)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，火山島弧向東移動，東海陸架盆地變?yōu)榛『笈璧亍?/li>
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.
由縫合線向北，沙爾布爾提山安山巖線是中奧陶世至中、晚志留世發(fā)育起來的火山島弧。