Question

Seafloor spreading causes an oceanic plate to collide with a continental plate. If it were to go through the whole tectonic cycle, number the steps that would follow.

1. Step 1
The oceanic plate would subduct under the continental plate into the asthenosphere.
2. Step 2
Mantle convection would cause magma to rise up through divergent boundaries.
3. Step 3
From the intense heat and pressure within the mantle, the crust of the oceanic plate would mix with the rock of the mantle.

Answer 1

The steps related to the tectonic cycle following the collision of an oceanic plate with a continental plate would occur in the following order:

1. **Step 1**
The oceanic plate would subduct under the continental plate into the asthenosphere.

2. **Step 3**
From the intense heat and pressure within the mantle, the crust of the oceanic plate would mix with the rock of the mantle.

3. **Step 2**
Mantle convection would cause magma to rise up through divergent boundaries.

So the correct sequence is: 1, 3, 2.