Most of the islands are part of a geologically unstable and volcanically active island arc. 多數島嶼在地理上都是不穩定的火山活動(dòng)島弧。
The epithermal silver deposit and the Kuruko silver deposit are distributed over volcanic arcs and island arcs. 火山弧和島弧控制了淺成低溫熱液型和黑礦型銀礦床。
The Ellsworth basin lay between the epicontinental basin and the marginal magmatic arc during the Devonian. 除了上述兩個(gè)沉積盆地外，在羅斯海兩邊卻出露了火山巖，說(shuō)明該地當時(shí)處于俯沖帶附近的火山弧中。
The epithermal silver deposit and the Kuruko silver deposit are distributed over volcanic arcs and island arcs. 火山弧和島弧控制了淺成低溫熱液型和黑礦型銀礦床。
