oceans celebrated roughly extents representing
pangea tethys tectonics supercontinent fossils continent gondwana triassic everest continents era early mesozoic formation tectonic landmasses paleogeography scotese britannica arlington
oceans geogarage surface regions 2030
oceans spinning stopped equator mapsontheweb stood
sea earth level feet below landmasses oceans land surrounding continental uncovered donoghue notes look areas appear drained if time water