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Seafloor ______________. glomar. Scientist who first proposed that thermal convection in the mantle causes continental drift. Study with Quizlet and memorize flashcards containing terms like asthenosphere, crust, lithosphere and more.
seafloor spreading, theory that oceanic crust forms along submarine mountain zones, known collectively as the mid-ocean ridge system, and spreads out laterally away from them. This idea played a pivotal role in the development of the theory of plate tectonics , which revolutionized geologic thought during the last quarter of the 20th century.
The mid-ocean ridge is where the seafloor spreading occurs, in which tectonic plates—large slabs of Earth’s lithosphere—split apart from each other. Seafloor spreading was proposed by an American geophysicist, Harry H. Hess in 1960.
Harry Hess published 'The History of Ocean Basins' in 1962, outlining a theory of how tectonic plates can move which was later called 'sea floor spreading'. He identified the presence of mid ocean ridges, and that ocean trenches are where ocean floor is destroyed and recycled.
In 1965, a Canadian geophysicist, J. Tuzo Wilson, combined the continental drift and seafloor spreading hypotheses to propose the theory of plate tectonics. Tuzo said that Earth’s crust, or lithosphere, was divided into large, rigid pieces called plates.
This crossword puzzle reviews material about plate tectonics and the exploration of seafloor spreading, mid-ocean ridges, and deep-ocean trenches. In addition, it also has questions about the discoveries of continental drift through Alfred Wegener! Topics and vocabulary included: Marie Tharp; Bruce Heezen; Harry Hess; Mid-Ocean Ridges; Sonar ...
1 Οκτ 2024 · As upwelling of magma continues, the plates continue to diverge, a process known as seafloor spreading. Samples collected from the ocean floor show that the age of oceanic crust increases with distance from the spreading centre —important evidence in favour of this process.
