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Across 3. named after a ocean 7. 540million years ago 9. the less denser crust 11. Region of the Earth’s upper mantle that upwells to melt through the crust to form a volcanic feature 14. 600 million years ago 16. named after a contanet 17. 240 million years ago 18. __________ carries plates into the mantle 19. broken up into tectonic plates 20. what happens when the plates rub together

Down 1. when the denser crust goes under the less denser crust what does it create. 2. he was the first person to think that the plates were together at one time. 4. 200 million years ago 5. the plates push together and lift up to make a 6. 400 million years ago 8. from what late latin word 10. the denser crust 12. large-scale motions of earth's lithosphere 13. occurs along these plate boundaries. 15. its on topof each lithospher