The former is formed in trench - arc environment ofintracontinental rift, and the latter in marginal basin.

前者为陆内裂陷沟-弧环境产物．后者形成于陆缘盆地构造环境。

youdao

The current marginal sea and trench-arc-basin system of west Pacific is reformed by interaction of Pacific plate, Australian plate, and Eurasia plate in Cenozoic.

现今的西太平洋边缘海、沟弧盆体系，是新生代中晚期太平洋板块、澳大利亚板块与欧亚板块相互作用形成的。

youdao