Which of the following hypothesis was propounded by Harry Hammond Hess in 1962?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Sea floor spreading hypothesis.
Harry Hammond Hess propounded the Seafloor Spreading Hypothesis in 1962. His theory was a major contribution to the understanding of plate tectonics. Hess proposed that the ocean floors were slowly spreading apart due to the upwelling of molten material from the Earth's mantle at mid-ocean ridges. As new crust formed at these ridges, older crust was pushed away, explaining the movement of tectonic plates.
Hess's hypothesis helped to provide evidence for the concept of continental drift proposed by Alfred Wegener and laid the foundation for the development of the modern theory of plate tectonics.