Why do the temperatures of the rock inside the Earth at 100 km differ from the normal situation at mid-ocean ridge? What is going on there to cause this difference?

1) Using Figure A, what is the temperature of the rock inside the Earth at a depth of 100 km
a) in a normal situation
b) at a divergent plate boundary
c) at a convergent plate boundary
2) Why do the temperatures of the rock inside the Earth at 100 km differ from the normal situation at mid-ocean ridge? What is going on there to cause this difference? Hint: look at the diagram below the graphs in Figure A to help you answer this. Do not copy from the internet for this answer.
3) Why are the temperatures of the rock inside the Earth at 100 km similar in a normal situation and at a convergent plate boundary? Hint: look at the diagram below the graphs in Figure A to help you answer this. Do not copy from the internet for this answer.
4) What is the shallowest depth at which melting occurs at a divergent plate boundary according to Figure C above? Look at the solidus (melting curve) and the geotherm to determine this.

Last Completed Projects