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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.
- Rifting
Other articles where rifting is discussed: plate tectonics:...
- Rifting
23 Απρ 2021 · The crustal and tectonic structure of the Red Sea and especially the maximum northward extent of the (ultra)slow Red Sea spreading centre has been debated—mainly due to a lack of detailed...
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.
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.
1 Δεκ 2021 · Associated evidence of horizontal plate motion may be inferred from rocks that are diagnostic of oceanic spreading ridges – for example, mid-ocean ridge basalt (MORB) and associated sheeted dike complexes – although these features alone do not require subduction to be operating elsewhere on a planet, as lithosphere may be readily destroyed ...
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. The motivating force for seafloor spreading ridges is tectonic plate slab pull at subduction zones, rather than magma pressure, although there is typically significant ...
8 Φεβ 2018 · A fundamental feature of this seafloor spreading is the formation of transform faults of varying length that offset the ridge segments at 90°. This characteristic ridge-transform geometry is a key component of plate tectonics and governs the creation of new seafloor (Wilson, 1965 ).
