Seafloor Spreading - National Geographic Society
网页2023年11月29日 · 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 .
Plate tectonics - Seafloor Spreading, Continental Drift, Subduction
网页2024年9月10日 · Plate tectonics - Seafloor Spreading, Continental Drift, Subduction: 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 …
Seafloor spreading - Wikipedia
网页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 ...
Seafloor spreading | Evidence & Process | Britannica
网页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..
网页2015年8月26日 · By combining the sea floor spreading theory with continental drift and information on global seismicity, the new theory of Plate Tectonics became a coherent theory to explain crustal movements. Plates are composed of lithosphere, about 100 km thick, that "float" on the ductile asthenosphere.
How the Ocean Floor Helped Seal the Deal for Plate Tectonics
网页Today, Earth scientists accept seafloor spreading as an integral part of plate tectonics. “When you have two oceanic plates moving away from one another, that’s called a spreading center,” said Daniel Rasmussen, a volcanologist and Peter Buck postdoctoral fellow at the museum.
Continental Drift and Seafloor Spreading - Dive & Discover
网页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. These plates “float” atop an underlying rock layer called the asthenosphere.
Seafloor Spreading - SpringerLink
网页2021年1月1日 · Seafloor spreading was a critical step in the contentious scientific revolution from the previous static Earth paradigm to the now universally accepted plate tectonic paradigm. Today it refers to the processes creating …
Plate tectonics | Definition, Theory, Facts, & Evidence
网页2024年9月10日 · Incorporating the much older idea of continental drift, as well as the concept of seafloor spreading, the theory of plate tectonics has provided an overarching framework in which to describe the past geography of continents and oceans, the processes controlling creation and destruction of landforms, and the evolution of Earth’s crust ...
Continental Drift, Sea-Floor Spreading, and Plate/Plume Tectonics
网页2002年1月1日 · A convergent plate boundary consists of subduction zones and collision zones. In the development of the sea-floor spreading hypothesis, mid-oceanic ridges played a major role. From the global tectonics point of view, however, the role of convergent boundaries is equally important.