Sentences with phrase «in deeper sediments»

The methane in gas hydrates must come either from methane - producing bacteria living in the permafrost, or from the breakdown of organic matter in deeper sediments.

If you read the linked article (where it says «A scientific report» in this article), it states «Some bones in deeper sediments, they said, probably belonged to wild camels that people hunted for their meat.»

Some bones in deeper sediments, they said, probably belonged to wild camels that people hunted for their meat.

Parkes has found microbes in deep sediments that grow best at precisely the pressure at which he found them.

The time needed to destabilize large methane hydrate deposits in deep sediments is likely millennia [215].

It may be a change activity in shallow water or surface sediment organisms producing more methane, rather than increased melting in deep sediments — isotope ratios ought to help clarify that.

The time needed to destabilize large methane hydrate deposits in deep sediments is likely millennia [215].

Not exact matches

Susan Lorenz studied soil, sediment, ground and surface water samples, and said that although she found lead present in surface soils, it had not migrated to deeper soils or ground water.

The Inner Harbor is two - to - four feet deep in many areas, thanks to sediment from Onondaga Creek fed by the Tully mud boils, county officials said.

In some places, the carnivorous dinosaurs also left much deeper tracks in the sediment than elsewherIn some places, the carnivorous dinosaurs also left much deeper tracks in the sediment than elsewherin the sediment than elsewhere.

In particular, deep down, the researchers identified a layer of sediment where the water had a lower salinity than the water in the sediment above or beloIn particular, deep down, the researchers identified a layer of sediment where the water had a lower salinity than the water in the sediment above or beloin the sediment above or below.

We see the deep past here through narrow temporal and spatial windows — walk a mile in any direction and you are either hundreds of thousands of years earlier or later because you are walking on eroding sediments from different slices of time.»

Researchers have decoded the chemistry of the first of a wealth of unique compounds produced by a new genus of bacteria that dwells in deep - ocean sediments, and they have found it to be a potent inhibitor of human cancers in lab experiments.

Other hostile conditions deep in ocean sediments, such as scarce nutrients, high pressure, or extreme salinity, probably set life's limit in some places.

Oxygen from seawater permeated only the upper millimeter or so of sediment, but the researchers noticed something happening much deeper in the mud, more than a centimeter below, as if oxygen were available down there, as well.

When the researchers switched the electric current off by deoxygenating the water, thereby removing the electron acceptor at the sediment surface, the depth of the hydrogen sulfide layer in the sediment rose in less than an hour, as deeper microbes could no longer consume it.

Bacteria sitting in the top layer of sediment receive electrons that they use to consume oxygen from oxygen - deprived but well - nourished bacteria deep down, which consume hydrogen sulfide and carbon.

Permafrost was known to contain gas hydrates — icelike mixtures of water and organic gases first identified in deep - sea sediments which form only at very high pressures and low temperatures.

When the creatures that eat the plankton die, their shells and organic remains fall to the ocean floor, sequestering carbon in the deep water and sediments.

Real - world data back the claim: Accumulations of calcium carbonate in deep - sea Pacific sediments show that the Pliocene ocean experienced huge shifts at the time, with waters churning all the way from the surface down to about three kilometers deep, as would be expected from a conveyor belt — type circulation.

Core samples from deeper in the Lake Towuti sediment will show whether this drying evident during the last ice age also happened in previous ice ages.

Small organisms (meiofauna) inhabiting sediments in the deepest (> 10,000 m) ocean trenches are almost unknown.

This fits with what the team see in the rate of sediment accumulation in the deep sea — large flood events transporting more sediment, and moving it further.

In addition, the total amount of cesium retained more than 3 feet deep in the sands is higher than what is found in sediments on the seafloor offshore of the beacheIn addition, the total amount of cesium retained more than 3 feet deep in the sands is higher than what is found in sediments on the seafloor offshore of the beachein the sands is higher than what is found in sediments on the seafloor offshore of the beachein sediments on the seafloor offshore of the beaches.

Other papers in the issue examine how deep sea sediments may affect seismic wave readings, and evaluate how the Cascadia Initiative's data collection from ocean bottom seismometers has improved over the first three years of the study.

They found several, including a 375 - kilometer - diameter eddy that crossed the study site from February to March 2005, just before the strong deep currents and drop off in sediments and larvae.

The crises faced by humanity today are important to us, but they will eventually prove no more significant than a thin bed of sediment in the deep stratigraphy of the universe.»

The surface usually conceals oil buried deeper in the sediment.

Gard found similar fossils deeper down in the sediment cores, indicating that the Arctic ice partially cleared at various times from about 128 000 to 71 000 years ago — a period covering the latest interglacial and the early part of the latest ice age.

To untangle the impacts that these three climate stressors will have on seafloor diversity in the future, the researchers examined existing published data and collected new data on organisms living in deep - sea sediments in upwelling regions along continental margins, where the ocean and continental crusts meet along the seafloor.

In the depths of the Arctic Ocean, buried deep in the sediment, an ancient creature waited for over a million years to be discovereIn the depths of the Arctic Ocean, buried deep in the sediment, an ancient creature waited for over a million years to be discoverein the sediment, an ancient creature waited for over a million years to be discovered.

Tides, storms and other disturbances in shallow water will stir up the bottom, while further from shore, where the water is deeper, turbulence can not reach the ocean floor, allowing sediment to settle undisturbed.

Lutz and Falkowski cite one study where unique chemical compounds isolated from an actinomycete strain inhabiting deep - sea sediments about 3.3 kilometers down in the South China Sea have shown potent activities against three cancerous tumor cell lines and also showed antibacterial activities.

Proponents say that diverted rivers, industrial mining, deforestation, extinctions, and urbanization, among other human - driven phenomena, have made deep and permanent changes to the planet that will show up in sediment millions of years from now.

Analysing new data from marine sediment cores taken from the deep South Atlantic, between the southern tip of South America and the southern tip of Africa, the researchers discovered that during the last ice age, deep ocean currents in the South Atlantic varied essentially in unison with Greenland ice - core temperatures.

But «I was awestruck at the abundance and diversity of small animals of deep sea sediments,» Grassle recalled in a greeting he recorded in accepting one of two Japan Prizes announced today.

Czaja's fossils show the Neoarchean bacteria in plentiful numbers while living deep in the sediment.

As evidence, he pointed to large, deep pits at the base of the former ridge — «plunge pools» that were formed by the force of the waterfalls and later filled in with sediment.

Most of the deposits, some small and some large, are buried in or below permafrost and sediments in the ocean bottom along continental margins — where shallow offshore waters slope down toward the deeper ocean floor.

18Oc measured in foraminifera collected from deep sea sediment cores (Lisiecki et al., 2005).

The bacteria living in these sediments were respiring the oxygen but at a slower rate than the supply of organic material dropping out of the water column, allowing these ancient deep marine sediments to remain oxygenated.

A University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science - led research team analyzed the sediments of mesophotic coral reefs, deep reef communities living 30 - 150 meters below sea level, to understand how habitat diversity at these deeper depths may be recorded in the sedimentary record.

Not only is there a much higher diversity of microbes under the seafloor than originally thought, large and active populations exist much deeper in the sediments than was believed, the team reports 21 July in Nature.

Thus aerobic metabolism can persist in deep marine sediments.

An analysis of sediment from 17 seabed sites — from European estuaries to the Great Barrier Reef in Australia and the deep Atlantic Ocean — found that the bathyal region of the Rockall Trough has more species than any other area so far measured.

This picture may be about to change in light of a study of deep - sea rocks and sediments led by John Parkes, a microbiologist at Cardiff University in the U.K.. By visiting oil - drilling projects at two sites in the Pacific in 2002, Parkes and colleagues obtained samples as deep as 400 meters beneath the seafloor.

By studying sediment cores from the deep Pacific near the Philippines, paleoclimatologist Lowell Stott of the University of Southern California in Los Angeles and his colleagues revealed that the temperatures of the deepest seas rose by around 2 degrees Celsius (3.6 degrees Fahrenheit) at least 1,000 years before sea - surface temperatures.

Researchers reconstructed Arctic circulation through deep time by measuring radioactive trace elements buried in sediments on the Arctic seafloor.

This study therefore shows that climate warming is not the only explanation of global ecological disasters in the past on Earth: it is important to continue analysing ancient marine sediments to gain a deeper understanding of the earth's climate system.

In the Mississippi River system, however, a series of dams on various upstream tributaries have reduced sediment supply to the delta, while levees on the lower part of the river have artificially channelized the flow, forcing sediments to be deposited beyond the delta in the deeper Gulf of MexicIn the Mississippi River system, however, a series of dams on various upstream tributaries have reduced sediment supply to the delta, while levees on the lower part of the river have artificially channelized the flow, forcing sediments to be deposited beyond the delta in the deeper Gulf of Mexicin the deeper Gulf of Mexico.