Question

An accumulation of different sedimentary and metamorphic rocks combined with scraps of ocean crust is called _____. a dome a volcanic island arc an accretionary wedge a fault-block mountain

Answer 1

An accumulation of different sedimentary and metamorphic rocks combined with scraps of ocean crust is called an accretionary wedge.

Answer 2

Accretionary wedge is the accumulation of metamorphic and sedimentary rocks combines with "scraps of ocean crust".

Step-by-step explanation:

• The sediments get accreted onto a tectonic plate which is non-subducting in nature. Most of the components of accretionary wedge include marine sediments and also erosional products of volcano island arcs.

• Tectonic collisions are the reason for the formation of accretionary wedges. The shape of an accretionary wedge is usually a triangle and continues to grow in size when it reaches critical taper.