Sentences with phrase «seabed when»

Huge volcano - triggered landslides can alter the seabed when they tumble into the ocean and sweep across the sea floor.

Not exact matches

Marine fossils are found in mountains when ancient seabeds are thrust up and made into mountain ranges over many millions of years.

Confirmation arrived in February this year, when an international team extracted 34 sediment cores from three sites on the seabed, revealing a fossilised coral reef that reaches 110 metres into the sea floor.

The ship would not be disturbed again until 1900, when a sponge diver clad in a clunky dry suit and brass helmet saw an unattached bronze arm from a sculpture on the seabed, says Alexander Jones, a historian of the ancient world at New York University who has studied the shipwreck and its cargo.

The first hint of its existence came in 2007, when seismic and sonar measurements revealed odd ridges and lagoons on the seabed.

When the oxygen content in the bottom water reaches a low point, the only survivors are ultimately bacteria that live on and in the seabed.

Formed when massive slabs of seabed limestone were thrust on top of one another, the Springs are in many ways a distinct eco-island, complete with locally endemic species.

When CO2 is injected into the seabed, sometimes we need to remove the water being pressed out of the rocks through a new well,» say Landrø and Torsæter.

«When the carcass of a vertebrate reaches the Mediterranean seabed and remains at shallow depths, it is free - living bacteria that degrade its bones and decompose the organic material.

Geologist John Gorter of ENI Australia was surveying for offshore oil there when he spotted the plateau on a seismic profile of the seabed in the late 1990s.

The current debate about the treaty's stability began in October 2007 when the U.K. announced that it would file a claim under the Law of the Sea extending the seabed boundaries of their Antarctic territory based on the extent of the continental shelf.

, sometimes endearingly referred to as «zombie worm,» was devouring the bones of a decaying whale when it was discovered off the California coast on the Monterey Bay seabed.

When sound waves pass from compact rock in the seabed to the pliant salt below, they kick into overdrive, scattering and distorting the seismic waves.

Now veined octopuses, Amphioctopus marginatus, have been filmed picking up coconut halves from the seabed to use as hiding places when they feel threatened.

When the zoobenthos die, their bodies are eventually buried in the sediment of the seabed, sequestering carbon in the process.

On the seabed, dissolved iron (II) ions have combined with the hydrogen sulphide to form iron sulphides, for example pyrite, FeS2, which is unstable when the moist wood is exposed to oxygen: FeS2 (s) + 7 / 2O2 + (n +1) H2O → FeSO4 · n (H2O)(s) + H2SO4 (aq)

But when their worst fears are realized and the cage breaks away from their boat, they find themselves plummeting to the bottom of the seabed, too deep to radio for help without making themselves vulnerable to the savage sharks, their oxygen supplies rapidly dwindling.

When diving here, the first thing that you'll notice is the burst of yellow, white and purple corals and gorgonians that plaster the seabed far below you.

At the base of Alcedo Volano, we disembark at Urbina Bay, where we find four miles of its coastal seabed with marine life exposed due to a dramatic uplift in 1954 when the volcano erupted.

He said some Russian colleagues mentioned another possible incident in the 1990s when Arctic surface ice seemed to change in relation to seabed volcanic activity.

Now we're in a time when experts debate whether the peak of production has been reached, or whether ever - higher prices will simply drive exploration ever more to the fringes for new sources — be they tar sands or under the Arctic Ocean seabed.

Here's an excerpt from the news release on the fascinating work examining the response of certain worm species when transplanted in and around the 1,850 - year - old seabed CO2 vent off Naples:

When the saw got stuck, they already had a backup plan with equipment sitting on the seabed waiting.

''... worked with two sediment cores they extracted from the seabed of the eastern Norwegian Sea, developing a 1000 - year proxy temperature record «based on measurements of δ18O in Neogloboquadrina pachyderma, a planktonic foraminifer that calcifies at relatively shallow depths within the Atlantic waters of the eastern Norwegian Sea during late summer,» which they compared with the temporal histories of various proxies of concomitant solar activity... This work revealed, as the seven scientists describe it, that «the lowest isotope values (highest temperatures) of the last millennium are seen ~ 1100 - 1300 A.D., during the Medieval Climate Anomaly, and again after ~ 1950 A.D.» In between these two warm intervals, of course, were the colder temperatures of the Little Ice Age, when oscillatory thermal minima occurred at the times of the Dalton, Maunder, Sporer and Wolf solar minima, such that the δ18O proxy record of near - surface water temperature was found to be «robustly and near - synchronously correlated with various proxies of solar variability spanning the last millennium,» with decade - to century - scale temperature variability of 1 to 2 °C magnitude.»