Chapter 4.6, Problem 3A

Oceanic crust and the underlying rocks to a depth of about 100 kilometers have a basaltic composition Does the melting curve for basalt indicate that the lithosphere above approximately 100 kilometers has or has not reached the melting temperature for basalt? Therefore, at those depths should basalt be solid or molten?

The melting temperature _____ been reached

Basalt should be _____