mid-oceanic ridge


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Related to mid-oceanic ridge: rift valley, Subduction zone

mid-oceanic ridge

[′mid‚ō·shē¦an·ik ′rij]
(geology)
A continuous, median, seismic mountain range on the floor of the ocean, extending through the North and South Atlantic oceans, the Indian Ocean, and the South Pacific Ocean; the topography is rugged, elevation is 0.6-1.8 miles (1-3 kilometers), width is about 900 miles (1500 kilometers), and length is over 52,000 miles (84,000 kilometers). Also known as mid-ocean ridge; mid-ocean rise; oceanic ridge.
References in periodicals archive ?
The trough associated with the mid-oceanic ridges is deeply depressed, and on occasion extends into the lower mantle.
Each year, Congress has reinstated funding for this program, which includes, among other activities, expeditions with the submersible ALVIN to mid-oceanic ridges.
Just as the scars and wrinkles on a person's skin can tell the story of a life, the faults and topography of the seafloor may reveal a history of the ocean crust as it is churned out at mid-oceanic ridges.
For researchers who have used multibeam systems in their studies, "the data have been like allowing us to remove several layers of opaque glass and get closer to an accurate definition of the seafloor," says Jeff Fox at the University of Rhode Island at Narragansett, who uses academic Seabeam systems in his research on the magmatic and tectonic processes at mid-oceanic ridges.
When scientists were outlining the scientific objectives of the Ocean Drilling Program (ODP) five years ago, they made drilling at mid-oceanic ridges their number one priority.
Because these larger features have been well documented, Marsh's group focused on detecting smaller features such as the shape of the water above fracture zones that slice through mid-oceanic ridges.
The seafloor has been likened to a giant tape recorder, because as it is churned out conveyor-belt-style at mid-oceanic ridges, it becomes imprinted with the earth's changing magnetic field.
studied the rates at which the six major mid-oceanic ridges churn out new lithosphere (oceanic crust overlying tectonic plates).