What do the crust and the upper mantle form
- What do the crust and the upper mantle create or form
- What do the crust and outer portion of the upper mantle form
- What do the earth's crust and upper mantle form
- What does the crust and the upper mantle form
- The crust and the upper mantle form what
- What do we call the place where the crust and upper mantle form plate tectonics