Sentences with phrase «of ice deposited»

Chunks of ice deposited by the neighbouring glacier swirl across the otherwise untouched lake and provide cabin colonists with an organic view of the water and craggy peaks beyond with just the mustard shelter for company.

«Based on the likely location of ice deposits during this period of Mars» history, and the amount of meltwater that could have been produced by Lyot ejecta landing on an ice sheet, we think this is the most plausible scenario for the formation of these valleys» said David Weiss, a recent Ph.D. graduate from Brown and the study's lead author.

Not exact matches

Lurking between Mars and Jupiter is the largest asteroid in the solar system: a dwarf planet called Ceres, which has ice volcanoes, salt deposits, and other features that suggest it's hiding an ocean of salt water.

As melting ice from these glaciers formed streams and rivers along the edge of the glaciers, thick sequences of sand and gravels were deposited.

Each volcano's magnitude and its impact on climate can be estimated from the amount of sulfate deposited in the ice.

The study notes that narrowing down that percent range requires particle accelerator experiments on water ice to more accurately gauge the number of chemical reactions that result per unit of energy deposited by cosmic rays and solar energetic particles.

The spatial deposition of sulfur particles in the bipolar ice cores, as calculated in the model, agrees well with the actually measured deposits of large volcanic eruptions, such as Pinatubo in 1991 or even of Tambora of 1815.

«In any case, the results of our model study give a clear indication that the bipolar variability of sulfate deposits must be taken into consideration if the traces of large volcanic eruptions are to be deduced from ice cores,» says Dr. Krüger, «Several research groups that deal with this issue have already contacted us to verify their data through our model results.»

On the western side the ice cores showed deposits of PFASs initially increasing as they were used more and more in European industry in the 1980s, and then decreasing as industrial output changed in the early 2000s.

These ice deposits would likely require a thin insulating blanket, perhaps a layer of fine - grained surface material, or regolith, to keep it from sublimating away.

Messenger's instruments will help determine if ice was slowly deposited by comets over billions of years of collisions.

Circling the poles, the LRO will profile mineral abundances, scout potential landing sites, and look for water - ice deposits, imaging the terrain to a resolution of three feet.

Although Mercury's daytime temperatures exceed 800 degrees Fahrenheit, radar studies indicate that the planet has vast deposits of ice within the perpetually dark, frigid craters at its poles.

The temperatures inside the shadowed craters are just right for ice deposits blanketed by regolith darkened by organic compounds, explained David Paige of the University of California, Los Angeles.

Scientists analyzing the texture of the rocks deposited by the landslides say they were transported by liquid water, water ice, or mud.

Then the researchers used an electron beam to carve away two squares of ice, exposing the tops of some nanotubes, and deposited a layer of palladium on top of this ice mask.

The deposits are exposed in cross section as relatively pure water ice, capped by a layer one to two yards (or meters) thick of ice - cemented rock and dust.

At some of them, the exposed deposit of water ice is more than 100 yards, or meter, thick.

This ice age was followed by the formation of limestone deposits through bacteria, marking the return of life on Earth at more moderate temperatures.

Dundas and co-authors say that banding and color variations apparent in some of the scarps suggest layers «possibly deposited with changes in the proportion of ice and dust under varying climate conditions.»

Researchers using NASA's Mars Reconnaissance Orbiter (MRO) have found eight sites where thick deposits of ice beneath Mars» surface are exposed in faces of eroding slopes.

Ice at the bottom of the borehole was deposited about 70,000 years ago; ice about one - sixth of the way up about 50,000 years ago; and ice about one - third of the way to the surface 20,000 years aIce at the bottom of the borehole was deposited about 70,000 years ago; ice about one - sixth of the way up about 50,000 years ago; and ice about one - third of the way to the surface 20,000 years aice about one - sixth of the way up about 50,000 years ago; and ice about one - third of the way to the surface 20,000 years aice about one - third of the way to the surface 20,000 years ago.

These signals allowed the researchers to peek under the planet's rusty sands for hidden deposits of ice.

Much of the dust deposit east of the Rockies arrived in the last ice age, which ended some 11,000 years ago, when particles that had been ground up and transported by glaciers were deposited by meltwater streams.

Or perhaps the coating is not ice but a large deposit of sulfur.

* Chinese glacial deposits show that three of the oldest and coldest ice ages in Earth's history date from 600 to 750 million years ago.

Rime forms when droplets of water vapor deposit directly as ice on surfaces.

«The conditions on Ceres are right for accumulating deposits of water ice,» said Norbert Schorghofer, a Dawn guest investigator at the University of Hawaii at Manoa.

«While cold traps may provide surface deposits of water ice as have been seen at the moon and Mercury, Ceres may have been formed with a relatively greater reservoir of water,» said Chris Russell, principal investigator of the Dawn mission, based at the University of California, Los Angeles.

Data reported by NASA's New Horizons New Horizons mission to the Pluto system shows unusual terrain in this region, which features a large deposit of nitrogen ice with a pattern of polygons that are thickest at their centers and dip at their edges.

Such a deposit of ice needles is not usually considered «snow,» however; in the Arctic, for instance, we might refer instead to an ice fog.»

Over the weekend, Phoenix scooped up a shovel - full of ruddy dirt using its 7.7 - foot (2.4 - meter) robotic arm to deposit into its Thermal and Evolved - Gas Analyzer, a suite of tiny, single - use ovens for baking soil and ice samples to study their chemistry.

Earlier studies of lakeshore deposits had shown that the lake was at its highest every 2000 years, matching advances of ice sheets.

«So we knew that in the final period of the recent Ice Age, between 30,000 and 15,000 years ago, large amounts of sediment were deposited in the region in a relatively short period of time,» explains Dr. Karstens.

From there they could control a fleet of robotic explorers and investigate the composition of ancient ice deposits in the forever - dark craters of the Aitken basin.

The only way that significant amounts of this mud could have been deposited as sediment in the sea would be if the ice sheet had retreated inland and eroded these rocks, say the team.

The movement of these large masses of ice also leaves distinct marks on the walls of valleys and in the form of deposits of glacial sediment.

As wind and rain erode the mountain range, massive rivers carry more than a billion tons of sediment into the Bay of Bengal each year; in some places, the layer deposited since the most recent ice age is more than one kilometer thick.

At left, and across the bottom of the scene, gray - white CH4 ice deposits modify tectonic ridges, the rims of craters, and north - facing slopes.

Their findings indicated that twice as much soot was deposited on snow in winter compared with summer, meaning that the sunlight - absorbing soot likely caused greater melting of the Arctic ice cap during the winter.

«At Kima'Kho, we were able to map a passage zone in pyroclastic deposits left by the earliest explosive phase of eruption, allowing for more accurate forensic recovery of paleo - lake levels through time and better estimates of paleo - ice thicknesses,» says UBC volcanologist James K Russell, lead author on the paper published this week in Nature Communications.

The paleoclimate data, which included mainly changes in the oxygen isotopes of the calcium carbonate deposits, were then compared to similar records from other caves, ice cores, and sediment records as well as model predictions for water availability in the Middle East and west central Asia today and into the future.

In fact, Natural Resources Canada has a collection of ice cores that contain layers deposited up to 8,000 years ago — a time when the earth was far warmer than today.

In addition to water, organic molecules, which could have been deposited on the surface by crashing comets, somehow would have to get through the thick shells of ice for life to form, a situation that puts Saturn's geyser - spewing moon Enceladus at the top of Nimmo's list of potential spots for life.

Mars Express» antenna booms form the probe's Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) instrument, a ground - penetrating radar designed to peer beneath the red planet's surface and scan for deposits of water or ice.

«Some of the observed features included ancient river beds, craters, massive extinct volcanoes, canyons, layered polar deposits, evidence of wind - driven deposition and erosion of sediments, weather fronts, ice clouds, localized dust storms, morning fogs and more,» NASA wrote in a summary of the mission.

As MGS skimmed the planet from pole to pole, it tracked changes in carbon dioxide ice deposits near the south pole of Mars.

«The randomly jumbled mountains might be huge blocks of hard water ice floating within a vast, denser, softer deposit of frozen nitrogen within the region informally named Sputnik Planum.»

Massive icebergs calving off of Antarctic ice sheets and floating through the Southern Ocean deposit iron, which fertilizes the seawater and nurtures massive phytoplankton blooms.

Dr. Jerison studies systems governed by simple rules that nonetheless exhibit complex behaviors, such as phase transitions — for instance, when a slight temperature increase causes ice to melt into liquid water; and threshold phenomena — for instance, when a small extra deposit of soil causes a stable slope to topple over into a landslide.