Seafloor spreading helps explain continental drift in the theory of plate tectonics .
The idea that the ocean floor itself moves and carries the continents with it as it expands from a central axis was by Harry Hess of Princeton University .
The idea that the ocean floor itself moves and carries the continents with it as it expands from a central axis was by Harry Hess of Princeton University .
Make this simpler: Seafloor spreading helps explain continental drift in the theory of plate tectonics . Output: