Sentences with phrase «marsili seamount»

Interior Secretary Ryan Zinke has recommended that President Trump alter the way several national monuments are managed, including the Northeast Canyons and Seamounts off the New England coast — the only marine monument -LSB-...]

Hotspots tended to be closer to shore and near features such as coral reefs, seamounts, and islands.

This means a local earthquake or eruption within Marsili would be sufficient to cause the seamount's flank to collapse, triggering a tsunami that would strike the coast of southern Italy (Geophysical Research Letters, DOI: 10.1029 / 2009GL041757).

In related work, geologist Warren Sharp of the Berkeley Geochronology Center in California analyzed isotopes of radioactive argon in the rocks to reexamine the ages of seamounts at the chain's bend.

Several other Pacific seamount chains also show similar bends at about the same time, he reports.

Using drilling, seismic surveys, and heat - flow probes, the team found a direct flow between two seamounts, called Grizzly Bare and Baby Bare.

Related sites Ocean Drilling Program Details of Hawaiian - Emperor seamount drilling cruise U.S. Geological Survey background on the Hawaiian hot spot

The JAMSTEC research vessel RV Yokosuka sailed from Nuku'alofa in Tonga this morning, heading towards New Zealand to explore the animal life on deep undersea mountains, or seamounts.

The study shows that mounds of old volcanic rock, called seamounts, are the drains and spigots for a vast plumbing system that pumps hot, mineral - rich fluids under the sea floor.

The Hawaiian - Emperor seamounts form a prominent «V» in the Pacific Ocean.

Because volcanic rocks are porous, some oceanographers speculated that cold seawater percolates into seamounts, warms up in the crust, and emerges at other seamounts as mineral - rich fluids.

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.

The earthquakes at Axial Seamount are small and the seafloor movements gradual and thus can not cause a tsunami.

But others think that the new seamount dates bolster the moving plate hypothesis instead.

Scientists have successfully forecast the latest eruption of Axial Seamount, an active submarine volcano located about 300 miles off the coast of Oregon.

They based their forecast on some of their previous research — funded by the National Science Foundation (NSF) and the National Oceanic and Atmospheric Administration (NOAA), which showed how the volcano inflates and deflates like a balloon in a repeatable pattern as it responds to magma being fed into the seamount.

Axial Seamount, an active underwater volcano located about 300 miles off the coast of Oregon and Washington, appears to be erupting — after two scientists had forecast that such an event would take place there in 2015.

«Undersea volcano: Axial Seamount off Northwest coast is erupting.»

Chadwick and Nooner are scheduled to go back to Axial in August to gather more data, but it may be possible for other researchers to visit the seamount on an expedition as early as May.

More than 540 international expeditions sailed to coral reefs, hydrothermal vents, seamounts, and open ocean waters to assemble a comprehensive picture of the diversity, habitats, and abundance of animals and microbes living in the sea.

Last year, Ballard investigated the Eratosthenes seamount, a 700 - metre - deep tabletop south of Cyprus, and says it does indeed seem to represent a relic surface.

As a home for sensitive scientific equipment, though, Axial Seamount carries big risks.

The second spot was Axial Seamount, an active underwater volcano, along with its associated hydrothermal vents, where the team could study the transfer of minerals from beneath the seafloor into the water and access hardy microbes that thrive in the vent fluids, which can reach 250 degrees Fahrenheit.

Finally, in the late spring of last year, the cable - laying vessel Dependable began stringing 560 miles of fiber - optic line from Pacific City, Oregon, to Hydrate Ridge and Axial Seamount.

Associate Professor of Earth, Ocean and Atmospheric Science Amy Baco - Taylor, in collaboration with a team from Texas A&M University, observed these reefs during an autonomous underwater vehicle survey through the seamounts of the Northwestern Hawaiian Islands.

«What accounts for the resilience of these corals on seamounts in the Pacific remains to be determined.»

Even parts of the sea that lack impressive corals or craggy seamounts can host important, if tiny, life - forms.

«Neither the chlorophyll nor the currents explain the unusual depth distributions of the reefs, why they actually get shallower moving to the northwest along the seamounts,» Baco - Taylor said.

He spent the next decade and a half returning to the seamount, El Bajo, trying to understand what such huge aggregations of hammerheads were doing and how they navigated during their daily foraging routes.

The seamount eventually became a magnet for scientists and photographers alike.

«We suspect, but we have no clue, that there was one region that was particularly stuck — an old seamount or chunk,» Simons explains.

Every year they gathered around seamounts and rotated in a slow - motion courting dance, circling during the day and dispersing at night for weeks.

Something — perhaps a seamount on the sinking plate — pinned the high - slip patch of fault in place for 500 or 1000 years, they argue, while patches around it failed repeatedly in smaller quakes.

Klimley found the seamount was like a bike hub, with sharks following various spokes up to 10 miles out to find food.

Hammerheads turned out to have a complicated migration from one food source to another, with lives spent visiting islands and seamounts thousands of miles apart.

Even the most advanced map made by that technique has trouble identifying and locating seamounts less than 2 kilometers tall.

Tests in the Pacific Ocean showed that the instrument, a radar altimeter called AltiKa, can spot seamounts as small as 1 kilometer tall.

Researchers say it could boost the number of known seamounts from 10,000 to 100,000.

But a new study demonstrates how a French radar instrument on an Indian satellite could greatly enhance seamount maps, putting submariners on safer courses while helping with climate science, fisheries science, and tsunami forecasts.

Professor Müller concluded: «Our results help resolve a major enigma of why volcanic seamount chains on the same tectonic plate can have very different shapes.

Water tends to discharge where fluid flow is more difficult due to less favorable rock properties or smaller seamount size.

The more coherent and rapid the motion deep in the mantle, the more acute its effects are on the shape of seamount chains above,» he said.

This school was photographed at Bajo Alcyone, a seamount that peaks at a depth of 30 meters.

This finding is consistent with field observations suggesting that smaller seamounts are favored as sites of hydrothermal discharge.

The models show that water tends to enter the crust («recharge») through seamounts where fluid flow is easiest due to favorable rock properties and larger seamount size.

The flow patterns explain how the enigmatic bend in the Hawaiian - Emperor seamount chain arose.

Moving tectonic plates sit above the mantle and carry newly formed seamounts away from the plume underneath — the oldest seamounts in a chain are therefore furthest away from the plume.

«Hydrothermal siphon» drives water circulation through seafloor: New study explains previous observations of ocean water flowing through the seafloor from one seamount to another.»

Volcanic seamount chains such as Hawaii were created from magma produced near the surface by mantle plumes.

The physical mechanism causing the unique, sharp bend in the Hawaiian - Emperor seamount chain has been uncovered in a collaboration between the University of Sydney and the California Institute of Technology (Caltech).