Which of the following is true about igneous processes along oceanic divergent boundaries as shown in this figure?
A)Oceanic crust moves toward the ridge in a conveyor-belt manner.
B)Most of the mantle is molten,not solid.
C)Solid asthenosphere rises as plates move apart.
D)Magma generated in the crust drips down into the mantle.

Question

Which of the following is true about igneous processes along oceanic divergent boundaries as shown in this figure? 
A)Oceanic crust moves toward the ridge in a conveyor-belt manner. 
B)Most of the mantle is molten,not solid. 
C)Solid asthenosphere rises as plates move apart. 
D)Magma generated in the crust drips down into the mantle.

Quizplus · Accepted Answer

Along oceanic divergent boundaries, the rising solid asthenosphere creates tension stresses that drive plate separation. This leads to the formation of a rift valley and the upwelling of mantle material, which partially melts to generate magma. As this magma rises, it cools and solidifies to form new oceanic crust, which moves away from the ridge in a conveyor-belt-like manner. Therefore, option C is correct, while options A, B, and D are incorrect.

Which of the Following Is True About Igneous Processes Along