1. However, recent temperatures are the warmest ever observed for many ocean basins . 2. This lightweight rock " floats " atop the heavier crust in ocean basins . 3. Most oceanic crust in the ocean basins is less than 200 million years old. 4. The Indian Ocean and some other ocean basins do not have tsunami warning systems. 5. Adelita was the first animal of any kind ever tracked across an ocean basin . 6. Sedimentary copper forms within ocean basins in sedimentary rocks. 7. These social sharks are often migratory, traveling huge distances around ocean basins in large schools. 8. This is especially important when multiple storms are occurring simultaneously in the same ocean basin . 9. This reduced the world's ocean basin capacity and caused a rise in sea level worldwide. 10. Intercratonic orogenic belts are characteristic of ocean basin closure.