Sentences with phrase «volcanic glasses»

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.

«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.

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.

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

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.

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.

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

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.

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).

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

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.

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.

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

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.

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.

Recent studies have revealed volatile material embedded in lunar volcanic glass collected by Apollo astronauts.

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.

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

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

Contiguous and continuous 10 - cm samples were treated with 1 mol / L HCl, sieved (> 25 μm) and density separated (1.95 — 2.55 g ⋅ cm − 3) to isolate volcanic glass shards, which were counted under high - power microscopy.

The electron probe was calibrated using a suite of characterized minerals and oxides standards; accuracy and precision was monitored by intermittent analysis of fused volcanic glass standards ATHO - G and StHs6 / 80 - G, from the Max - Planck - Institut für Chemie — Dingwell (MPI - DING) collection (35, 36)(Table S1).

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.

Based on the existing age model (24), we targeted a search for cryptotephra (subtle horizons of volcanic glass shards not visually apparent or detectable using remote sensing methods) on the depth interval of 20 — 40 m below lake floor (MBLF) in drill sites MAL05 - 1C and MAL05 - 2A in search of the YTT.

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

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.

Oldest known, bacterial «trace fossils» found as mineralized tubes with organic residues in undersea volcanic glass 3.34 billion years old, which were etched by «rock - eating» bacteria along cracks (more).

«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.»

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

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.

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

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

Photographs of its many volcanoes and hot springs and the isolated huts and cottages built for the enjoyment of them culminate in a gorgeous Richard Long - like floor piece made of chunks of obsidian, or volcanic glass.

Light Shines Out of Me consists of a three - square - metre underground chamber entirely clad in amethyst crystals mined in Brazil and surrounded by a field of obsidian volcanic glass, collected by the artist in the northwestern United States.

This can become difficult since the ice chronologies can only be checked by finding and definitively identifying tephra (volcanic glass shards) that can be attributed to these key eruptions; sulphate peaks in the ice are not volcano specific.

(B) The Holocene record of iceberg activity (black curve) is a stack of the four cores showing the combined detrended record of hematite - stained grains, detrital carbonate, and Icelandic volcanic glass.

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.

Not exact matches

Your average fundamental sell - side analyst has spent the year kneeling in the grass, gazing at ants through a magnifying glass while hurricanes, earthquakes and volcanic explosions raged all around him.

Where other ovens use ceramic or glass - based insulation, Fontana Forni ovens use rock wool spun from basalt or volcanic rock.

In 2013, Corrado Cimarelli, a volcanologist at the LMU University of Munich, re-created volcanic lightning in his lab by pushing dust into a small glass tube at extremely high pressure.

Air bubbles collect and explode at the surface of many viscous liquids, as observed with polymer foams, in glass furnaces, and during volcanic eruptions.

Additional questions surround Becker's impact glass, which Renne and others believe could be volcanic.

They have also baked up specimens for Houston, Texas, where the glass - dominated architecture would yield a grayish glass if nuked, and for New York City, whose iron - heavy construction leads to a darker, volcanic - looking glass.

The energy of impacts that create such craters can be high enough to melt rock; these melts cool rapidly, forming impact glass — a smooth, dark rock, similar to its volcanic cousin, obsidian — which contains various microscopic structures and crystals.

The glass hinted that the large volcanic eruptions that formed the lunar basins 3.8 to 3.1 billion years ago also emitted large amounts of gas.

Their water content is less than 0.03 %, much lower than volcanic spheres, and they contain inclusions of the fused quartz glass that is characteristic of a hot impact.

Glass compositions of the YTT (open squares) are clearly distinct from tephra of the Rungwe Volcanic Province (26) and of the Olkaria (27) and Eburru (28) volcanoes, Kenya, which have produced rhyolitic eruptions during the last 150 ka..

Smith quickly identified the pieces as cryptotephra, very old microscopic glass shards that were ejected during a volcanic eruption.

UNLV emeritus geosciences professor Gene Smith (right) and colleagues identified glass shards from 74,000 - year - old volcanic eruption for study in this week's edition of the journal Nature.

Fassbinder films life in the cosseted class as a masque of glass and mirrors, replete with alluring deceptions and suave surfaces that belie volcanic passions.