mid-ocean ridge


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mid-ocean ridge:

see plate tectonicsplate tectonics,
theory that unifies many of the features and characteristics of continental drift and seafloor spreading into a coherent model and has revolutionized geologists' understanding of continents, ocean basins, mountains, and earth history.
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mid-ocean ridge

[′mid¦ō·shən ′rij]
(geology)
References in periodicals archive ?
On average, there is about one vent site for every 100 kilometers (62 miles) of mid-ocean ridge, so it followed that there should be just one vent site along the entire Mid-Cayman Spreading Center.
Second, when non-transform offsets of mid-ocean ridge segments were first recognized along the Galapagos Spreading Centre and East Pacific Rise, application of the concepts learned there were key to reconstructing the history of the Juan de Fuca Plate (Riddihough 1977, 1984; Riddihough et al.
Ophiolites were equated with oceanic lithosphere that was created at mid-ocean ridges.
Previously, seismologists had thought that earthquakes along mid-ocean ridges either were associated exclusively with what they call normal faults, which feature a spreading apart of the ridge, or transform faults, structures similar to the San Andreas fault that produces "strike-slip" earthquakes whereby one side of the fault goes in one direction and the other in an opposite direction.
And we're finding some in places other than at mid-ocean ridges, where most have been seen before.
Plunging into the ocean off the west coast of Vancouver Island, the more than 800 kilometers of fiber optic cables that connect the research stations stretch across the continental shelf, plummet down the slope and across an abyssal plain, and skirt hydrothermal vents near a mid-ocean ridge where the Earth gives birth to new ocean crust.
But Sentry had already been committed to another expedition in March, so ABE was brought back into service for a mission to explore the Chile Triple Junction, the only place on Earth where a mid-ocean ridge is being subducted (or pushed beneath) a continent (South America) in a deep ocean trench.
The research expedition is taking place in the Pacific Ocean along the Mid-Ocean Ridge, which is 1,200 miles off the coast of Costa Rica.
Scientists think most deposits are on or near the mid-ocean ridge system, which runs 37,000 miles (60,000 kilometers) along the seafloor.
10) associated basalts characterized by Th and LREE depletion bear resemblance to mid-ocean ridge basalt (N-MORB).
On the trail of a mysterious life form, scientists board the deep-sea submersible Alvin and dive two miles down to the crest of the Mid-Ocean Ridge (the longest mountain chain on the planet).