contestada

Melting happens in association with a subduction zone. What is going on to cause this? Group of answer choices
a. The bending and friction associated with scraping off a pile of sediment, such as the Olympic Peninsula, makes the pile very hot, and the downgoing slab passes through the hot zone and melts in response.
b. The scraped-off pile from the subduction zone traps the Earth’s heat beneath, and the downgoing slab passes through this hot zone and melts in response.
c. The downgoing slab takes along water, and that water lowers the temperature at which rock melts to allow melting in and near the slab.
d. The immense friction between the downgoing slab and the overlying rocks makes the slab the hottest things in the mantle, causing much melting nearby.
e. The motion of the downgoing slab weakens the mantle so that a hot spot from deep below can rise along the downgoing slab and cause melting.

Respuesta :

maryasay

Answer:

c. The downgoing slab takes along water, and that water lowers the temperature at which rock melts to allow melting in and near the slab.

Explanation:

A subduction zone occurs when one of the plates at convergent boundaries, an area where tectonic plates meet, is an oceanic lithosphere.  

These oceanic plates are high in temperature on formation but as they cool, they descend into the mantle below. This descent applies pressure until water is liberated from the lowering crust. The water in turn rises into the surrounding mantle and lowers the temperature at which the rocks melt to produce magma which are partly melted rocks.  

This liberation of water from the subducting crust and accompanying melting is responsible for the formation of almost all magma at subduction zones.  

ACCESS MORE
ACCESS MORE
ACCESS MORE
ACCESS MORE

Otras preguntas