11. It is the border between two tropical cyclone basins : the Southwest Indian Ocean basin . 12. It is an ocean basin opening to the Atlantic. 13. The Clarks Fork of the Yellowstone River is federally designated as a Atlantic Ocean basin . 14. This ocean basin has been called the Monaro Basin. 15. Geographically, UTIG's scope includes the ocean basins , continental margins, Antarctica, and all sites of seismic activity. 16. The gash between the spreading continents gradually grew to form a new ocean basin , the Atlantic. 17. The movement of deep water in the ocean basins is by density driven forces and gravity. 18. The geologic history of Arctic Ocean basins is a major source of debate among marine geophysicists. 19. Why are there ocean basins , continents and mountains? 20. A geological feature in the Arctic Ocean basin , the St . Anna or " Svyataya Anna"
