9 how do volcanoes form at subduction zones? a a continental plate is pushed upward along with magma b the…

9 how do volcanoes form at subduction zones? a a continental plate is pushed upward along with magma b the collision of continental plates causes an explosion c the spreading of ocean plates allows magma to push upward d an ocean plate is pushed down and melted into magma

9 how do volcanoes form at subduction zones? a a continental plate is pushed upward along with magma b the collision of continental plates causes an explosion c the spreading of ocean plates allows magma to push upward d an ocean plate is pushed down and melted into magma

Answer

Brief Explanations:

在俯冲带，海洋板块密度较大，会俯冲到大陆板块之下。在这个过程中，海洋板块因高温高压等条件被熔化形成岩浆，岩浆上升喷发形成火山。选项A描述不准确；大陆板块碰撞一般形成山脉等，不是火山形成原因，B错误；海洋板块扩张与俯冲带火山形成无关，C错误。

Answer:

D. An ocean plate is pushed down and melted into magma