Sentences with phrase «at hydrothermal»

At hydrothermal vents, anoxic water containing reduced compounds like methane or sulfide mix with oxic seawater and the bacterial harvest energy.

At hydrothermal vents, scientists have found mineral - rich fluids with temperatures approaching 400 °C (750 °F) spewing out of the Earth.

On Earth, seawater interacts with rock at some hydrothermal vents to produce high concentrations of this molecule.

In the deep gold mines of South Africa, and under the sea, at hydrothermal vents where breaks in the fissure of Earth's surface that release geothermally heated waters — hydrogen - rich fluids host complex microbial communities that are nurtured by the chemicals dissolved in the fluids.

Such reactions at hydrothermal vents and in other extreme environments on Earth produce high abundances of hydrogen, which some microbes use for food.

Scientists working off the California coast use chemical - sniffing probes, robotically driven subs, and seafloor - tethered temperature sensors to watch flows of lava pave over a once - thriving ecosystem at hydrothermal vents several kilometers below the ocean's surface.

But the dominant theory nowadays is that primitive microorganisms first assembled in hot, chemical - rich water at hydrothermal vents at the bottom of the ocean.

«So far, we only know the surface of the ore deposits at hydrothermal vents.

One question that has long and intensively been discussed in research is: Where and how deep does seawater penetrate into the seafloor to take up heat and minerals before it leaves the ocean floor at hydrothermal vents?

Further analysis of these organisms may shed light on how the fauna living at hydrothermal vents to the east and west of them, in the Atlantic and Pacific oceans, are genetically related.

This research was partly based on seafloor sampling at hydrothermal vent sites using the NOC maintained robotic vehicle Isis, which was launched over the side of the RRS James Cook.

Such reactions at hydrothermal vents and in...

These include a groundwater sample found nearly 2 miles deep in a South African gold mine and at hydrothermal vents on the ocean floor.

Not exact matches

Bacteria thrive virtually everywhere on Earth — from sub-zero temperatures to over 750 degrees F (in hydrothermal vents at the bottom of the ocean), and in widely varying oxygen, pressure and nutrient conditions.

We found that the particles seen in our images, which were droplets of ocean only hours earlier, bore evidence of large organic molecules and compounds that indicated hydrothermal activity similar to that observed at deep - sea vents on Earth's seafloor.

One site at Columbia Hills in Gusev crater, was visited previously by the Spirit rover and features silica deposits interpreted by some as analogous to hydrothermal springs known to be inhabited on Earth.

The hydrothermal vent system was discovered by researchers from the Centre for Geobiology at University of Bergen (Norway).

The name Lokiarchaeota is derived from the hostile environment close to where it was found, Loki's Castle, a hydrothermal vent system located on the Mid-Atlantic Ridge between Greenland and Norway at a depth of 2,352 meters.

Some escapes via volcanoes and hot hydrothermal vents at midocean ridges.

In 2012, scientists from the Monterey Bay Aquarium Research Institute (MBARI) used undersea robots to discover a new hydrothermal vent field along the Alarcón Rise at the southern end of the Gulf of California.

Farmer helped select the landing site for Mars Pathfinder and thinks that the Mars Surveyor and Mars Odyssey spacecraft now in orbit have begun the job of meeting the first - stage requirements of finding potential ancient hydrothermal systems — for example, the Mars hematite site at Terra Meridiani.

The organisms likely survive using mechanisms similar to the ever - increasing parade of creatures that have been discovered living in the total darkness of hydrothermal vents at the bottom of the ocean, deriving energy from minerals in seafloor rocks.

Map of current land and ice separating the Weddell and Ross seas, courtesy of Wikimedia Commons / Wutsje / CIA Octopuses have made themselves at home in most of the world's oceans — from the warmest of tropical seas to the deep, dark reaches around hydrothermal vents.

«We predicted the peak ring would be a big hydrothermal system,» says Gulick, a geophysicist at the University of Texas, Austin.

They can be several tens of metres tall, and grow as minerals are deposited when the hot water meets the cold ocean water at the outlet of the hydrothermal vents.

New research suggests that surface - generated eddies help distribute heat, chemistry and life at deep - ocean hydrothermal vents

These delicate carbonate spires formed at an active vent site in the newly discovered Pescadero Basin hydrothermal field.

Geysers and deep - sea vents are hydrothermal phenomena in which water, heated and pressurized by molten rock, is released through vents at the land surface or into the oceans.

Lead scientist Jeffrey Hawkes, currently a postdoctoral fellow at Uppsala University in Sweden, directed an experiment in which the researchers heated water in a laboratory to 380 degrees Celsius (716 degrees Fahrenheit) in a scientific pressure cooker to mimic the effect of ocean water passing through hydrothermal vents.

It also confirms that hydrothermal vents are a plausible location for at least part of this process to have occurred.

Clague's and Vrijenhoek's dives revealed at least three different types of hydrothermal vents in the southern Gulf of California — black smokers, carbonate chimneys, and hydrothermal seeps.

A study described here today at the American Geophysical Union's biennial Ocean Sciences Meeting shows that RNA's chemical building blocks fall apart within days to years at temperatures near boiling — a finding that poses problems for some origin of life theories, especially ones picturing that life arose in scalding settings such as deep - sea hydrothermal vents.

At certain hotspots, the hydrothermal fluids vent back into the ocean.

This is partially because oxygen, which causes the iron to precipitate, had not yet entered the ocean to great depths, and also because the seafloor at that time contained abundant iron released by bursts of hydrothermal activity.

Europa has a global ocean locked away beneath a crust of ice; deep below, the moon's internal heat might create hospitable conditions, akin to hydrothermal vents at the bottom of the mid-Atlantic ridge and East Pacific Rise on Earth.

Knowing the lifespan of the larval tube worm and the current conditions at other hydrothermal vent sites should thus enable researchers to predict tube worm dispersal, team member Lauren Mullineaux of the Woods Hole Oceanographic Institute says.

But this past August, when scientists reported observing water from a hydrothermal vent acting like a liquid and a gas simultaneously at 867 °F, nature had thrown them for a loop.

Three new papers co-authored by Mike Russell, a research scientist at NASA's Jet Propulsion Laboratory, Pasadena, Calif., strengthen the case that Earth's first life began at alkaline hydrothermal vents at the bottom of oceans.

The pathways for the hydrothermal vents at a mid ocean ridge are marked clearly.

Cooperation with AVA Biochem is part of comprehensive KIT activities for manufacture of chemical energy carriers as well as intermediates from biomass with emphasis on so - called hydrothermal methods i.e. reactions in water at increased temperatures.

Hydrothermal carbonization i.e., a method which at high temperatures and increased pressure converts biomass in a closed system in aqueous suspension into biochar, served as the basis.

At the time of their designation, the largest of the sites was the 95,000 - square - mile Marianas Trench monument near the Northern Mariana Islands and Guam, an area that has been compared to an underwater Yellowstone and Grand Canyon for its unique geology of hydrothermal vents, mud volcanoes and pools of boiling sulfur.

«At first I thought we were looking at corals, but then it became clear that we'd stumbled upon hydrothermal structureAt first I thought we were looking at corals, but then it became clear that we'd stumbled upon hydrothermal structureat corals, but then it became clear that we'd stumbled upon hydrothermal structures.

Geochemist Nicholas Tosca of Harvard University and his colleagues calculated the salinity of long - gone waters from the composition of the salts left behind both at Meridiani Planum, where the Opportunity rover found the remains of salty groundwater, and at Gusev crater, where Spirit found volcano - related hydrothermal deposits.

To that end, he says, he and others have been examining hydrothermal vents at a mid-ocean ridge known as the East Pacific Rise.

Enceladus data point to a liquid ocean under the icy crust and hydrothermal vents at the south pole.

The NOAA portion of the prize is meant to spur the development of specific technologies that can help detect «sources of pollution, enable rapid response to leaks and spills, identify hydrothermal vents and methane seeps, as well as track marine life for scientific research and conservation efforts,» Richard Spinrad, chief scientist at NOAA, said in a statement.

Other manned submersibles can not dive deeper than about seven kilometers, says Lutz, who has made more than 85 underwater voyages on board the mini sub Alvin and was part of the first deep - sea exploration of hydrothermal vents in 1979, when he was a postdoc at Yale University.

Located at 2350 meters» depth on the Mid-Cayman Rise, hydrothermal fluids emanate from the Von Damm vent field at temperatures as high as 226 °C (439 °F).

The bizarre habitat gleamed in the lights of an underwater robotic probe as it explored the environs of a seafloor spring spewing water at superhot temperatures — known as a hydrothermal vent.