Αποτελέσματα Αναζήτησης
Seafloor spreading, theory that oceanic crust forms along submarine mountain zones 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..
- Rifting
Other articles where rifting is discussed: plate tectonics:...
- Rifting
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.
Seafloor spreading helps explain continental drift in the theory of plate tectonics. When oceanic plates diverge, tensional stress causes fractures to occur in the lithosphere.
1 Ιαν 2021 · Seafloor spreading is the mechanism by which new oceanic lithosphere is created at and moves away from the divergent plate boundaries known as mid-ocean ridges. The seafloor spreading hypothesis led to one of the most important paradigm shifts in the history of the Earth sciences, the plate tectonics scientific revolution.
11 Απρ 2024 · These patterns of magnetic “stripes” parallel to the oceanic ridge system and faithfully recording the changes in the planet’s magnetic polarity were perhaps the most compelling line of evidence yet in support of seafloor spreading, and thus plate tectonics.
Much of the answer lies in what might seem an unlikely place: the bottom of the ocean. In the 1950s and 1960s, scientists pieced together several lines of evidence to identify vast, volcanic stretches of the seafloor where lava cools to form Earth’s hard outer crust.
29 Νοε 2023 · Seafloor spreading is a geologic process in which tectonic plates —large slabs of Earth's lithosphere —split apart from each other. Seafloor spreading and other tectonic activity processes are the result of mantle convection. Mantle convection is the slow, churning motion of Earth’s mantle.
