Sentences with word «midocean»

Some escapes via volcanoes and hot hydrothermal vents at midocean ridges.
New crust forms at midocean ridges where the sea floor spreads apart.
But the vast majority should still be floating out there in the sea, trapped in midocean gyres — large eddies in the center of oceans, like the Great Pacific Garbage Patch.
It could be that the fluids over hundreds of miles of midocean ridges are influenced by even moderate quakes.»
And the Nankai Trough sediments are starkly different from another high - temperature environment, the hydrothermal vents on midocean ridges.
``... the molten rock oozing from midocean ridges lacks much of the uranium, thorium, and other trace elements that spew from some aboveground volcanoes.»
Such vents form on the ocean floor along so - called midocean ridges, areas where two tectonic plates drift away from each other.
The marks they leave on passing plates include volcanoes, swells and midocean plateaus
Although a few of Earth's largest islands, such as Greenland, are composed of the same continental crust as the mainland, most islands are made of a denser, chemically distinct oceanic crust, created midocean by magma welling up beneath separating tectonic plates.
To prevent maritime invasions, some countries require ships to exchange their ballast water in midocean.
The new find confirms that the ancient lavas formed at midocean ridges and found throughout deep ocean basins are by volume the largest ecosystem on Earth, scientists say.
Midocean ridge spreading does not occur universally, especially in Iceland and the North Pacific basin.
Quantifying bioluminescence was a leap that allowed Widder to accurately describe the midocean environment as a minefield.
The study suggests that layers of sediments perhaps 10 to 20 meters thick can seal the sea floor and make seamounts the most important conduits for heat and fluid flow — especially on the sloping flank of a midocean ridge, says oceanographer John Sclater of the Scripps Institution of Oceanography in La Jolla, California.
Such vents line the midocean ridges, where magma wells up to form new ocean crust.
If so, the bus depot is a midocean ridge such as the Juan de Fuca, which runs right below Axial.
Perched near the hot seams of some midocean ridges are curious pillars of lava, like Greek columns, many of them 45 feet tall.
Gregg and Chadwick developed a computer model of a lava flow from a midocean ridge.
Scientists have found fascinating ecosystems surrounding these vents, consisting of microbes, mussels, crabs, tube worms and even fish and octopusesand the new vents along the midocean ridge in the Indian Ocean are no exception.
Clustered there, on the midocean ridge near the Galápagos Islands, were giant clams and mussels and six - foot - long tube worms, anchored to the ground and sticking upright.
Away from the rocky slopes of the seamounts and midocean ridges, the ocean floor is everywhere cold and muddy, so scientists long assumed that fauna would be pretty much the same worldwide.
A rugged chain of volcanic mountains, the midocean ridge, runs down the center of the Atlantic, around Africa into the Indian Ocean, between Australia and Antarctica, and across the South Pacific, then up the East Pacific to California, where it becomes the San Andreas Fault.
Similar hydrothermal vent communities were eventually found at dozens of other points on the midocean ridge.
For tall, steep, midocean topography, such as the Hawaiian Ridge, it is estimated that about 85 % of the energy in the internal tide propagates away into the deep ocean with about 15 % of its energy being lost within about 50 km of the generation site.
The meridional overturning circulation (MOC) is computed from the sum of the Gulf Stream transport through the Florida Straits, directly measured via electromagnetic cables; the Ekman transport, estimated from QuikSCAT winds; and the midocean geostrophic transport, estimated from the moored array instruments.

Phrases with «midocean»

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