Sentences with phrase «volcanic glass»

They found up to 50 parts per million of water trapped in tiny spheres of volcanic glass.

This is not liquid water, but water trapped in volcanic glasses or chemically bound in mineral grains inside lunar rocks.

That view began to change in 2008, when researchers found water inside tiny spheres of lunar volcanic glass.

Because this crust contains considerable amounts of volcanic glass, understanding what changes the glass is important.

But when Lavigne's team examined shards of volcanic glass from this volcano, they found that they didn't match the chemical composition of the glass found in polar ice cores, whereas the Samalas glass is a much closer match.

Tiny beads of volcanic glass found on the lunar surface during the Apollo missions are a sign that fire fountain eruptions took place on the Moon's surface.

Zoning in on micro images of the naturally occurring volcanic glass Obsidian which were taken at Orgeon's Newberry National Volcanic Monument, the photographs go through a number of processes to become sculptural and something new, for example he «carefully pressed a flag of the United States into a bed of white frit (silica granules), then heat fused the frit, resulting in a crystalline debossment.»

Scientists have found traces of carbon in volcanic glass collected from the Apollo missions to the Moon.

The ratio in the Earth's water and in water from specks of volcanic glass trapped in crystals within moon dust match the ratio found in the chondrites.

Researchers have shown that melt inclusions within volcanic glasses from the Moon contain carbon.

The entire cliff would have been deposited very quickly from a fast - moving current of hot gas and ash (a pyroclastic density current), and the extreme temperatures (900-1000 °C) caused the ash to weld to the ground and effectively enameled the area in dense volcanic glass.

Last August Bilgi also unearthed a pair of razor - sharp volcanic glass blades that he believes were used to make the careful cuts.

On Earth, such rinds coat volcanic glass weathered by water.

The bounty of lunar samples brought to Earth by Apollo astronauts included volcanic glass hauled in during the Apollo 15 and 17 missions.

A few rocks brought back during Apollo 15 and 17 contain volcanic glass (SN: 6/29/13, p. 8).

That CO gas was responsible for the fire fountains that sprayed volcanic glass over parts of the lunar surface.

It may sound like a masochistic activity, but for certain microbes, eating volcanic glass is an entirely natural thing to do.

The result is the culmination of years of investigation by the team searching for water and other volatiles in volcanic glasses returned by NASA Apollo missions in the late 1960s and early 1970s.

Lunar melt inclusions are tiny globules of molten rock trapped within crystals that are found in volcanic glass deposits formed during explosive eruptions.

Obsidian means volcanic glass — and that's exactly what your nails will look like with this glittered polish.

«The presence of water on Earth rapidly breaks down such volcanic glass in only a few million years.»

The Atrix 2 has a nice bezel to its Gorilla Glass screen, much like the Photon as well, and carries the same shiny volcanic glass, darkened silver front and textured rubber covering on the back.

Obsidian, naturally occurring volcanic glass, is smooth, hard, and far sharper than a surgical scalpel when fractured, making it a highly desirable raw material for crafting stone tools for almost all of human history.

Melt inclusions are tiny dots of volcanic glass trapped within crystals called olivine.

PROVIDENCE, R.I. [Brown University]-- Tiny beads of volcanic glass found on the lunar surface during the Apollo missions are a sign that fire fountain eruptions took place on the Moon's surface.

The team analysed samples of volcanic glass from the Atlantic, Pacific and Indian oceans that contained traces of seawater that had been deeply cycled throughout Earth's interior.

The number of volcanic glass shards (shards / gram of sediment) was counted in 10 - cm (gray bars) then 1 - cm (black bars) depth samples.

Last summer, we found small pieces of volcanic glass in a cave that might be from an eruption that occurred in Indonesia nearly 70,000 years ago.

They found absorption bands characteristic of the iron in volcanic glass, a shiny substance similar to obsidian that forms when magma cools too fast for its minerals to crystallise (Geology, DOI: 10.1130 / G32755.1).

There's a shoemaker (one who makes shoes) but no Shoemaker, a spitz (variety of Pomeranian dog) but no Spitz, Pele's hair (fine filaments of volcanic glass) but no Pele.

Obsidian, a volcanic glass that is relatively rare around Lake Turkana, suggests that the marauders may have come from a different region.

To find the origin of the moon's water, the researchers looked at the trapped volcanic glass, referred to as a melt inclusion.

That a powerful volcano erupted somewhere in the world, sometime in the Middle Ages, is written in polar ice cores in the form of layers of sulfate deposits and tiny shards of volcanic glass.

Other ancient mariners, he discovered, had ventured into stormier waters to the north: Some 21,000 years ago, people had paddled boats across 30 miles of choppy water from Honshu to Kozushima Island to fetch shiny black obsidian, a type of volcanic glass, for stone tools.

Although other volatiles were previously detected in the lunar volcanic glasses and melt inclusions, the measurement of carbon remained elusive due to the high detection limits of the available analytical techniques.

«The combination of water and halogens found in the volcanic glasses enables us to preclude local seawater contamination and conclusively prove the water in the samples was derived from the mantle,» Dr Kendrick said.

Unlike microcrystals, for example, the tubules have complex forms — often observed abruptly changing direction to avoid intersecting each other, in a manner consistent with tunneling microbial behavior — and contain organic molecules associated with biological activity; the Ries tubules are also similar to fossil traces of microbes found in volcanic glass.

The pressure of the ice sheet constrains the lava flow, and glacial meltwater chills the erupting lava into fragments of volcanic glass, forming mounds and ridges with steep sides and flat tops.

Staudigel notes that the microbes may bore into the volcanic glass (see image) not only to graze but to evade predators.

The next step, he adds, is to compare the hydrogen and oxygen in samples of lunar ice with those same elements in the volcanic glass samples from Apollo.

In the spring 2017 issue, meet the people who work round the clock at Argonne's giant synchrotron, using X-rays to tease out the secrets of everything from volcanic glass to batteries to bacterial machinery — as well as engineers who travel the world to make reactors safer, physicists who collect model ships, and scientists inventing materials for the next technology breakthroughs.

«We can conceive of no sample type that would be more important to return to Earth than these volcanic glass samples ejected by explosive volcanism, which have been mapped not only on the moon but throughout the inner solar system.»

The stolons easily root in a media we use called perlite (heated, «puffed» volcanic glass).