Sentences with phrase «in volcanic glass»

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

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.

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 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.

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.

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.

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 pressurIn 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 pressurin his lab by pushing dust into a small glass tube at extremely high pressure.

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.

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

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.

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.

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

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

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.

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).

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.

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.

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.

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

The long tranquil beach of Santa Teresa is nearly perfect with its light beige - white sand shimmering with crushed shells and volcanic sea glass in the sunlight, shady palm and almond trees, and spectacular sunsets.

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.

Used to do the Job 1987 Steel, aluminum, coal, copper, iron, zinc, copper carbonate, brass, bronze, saltpeter, bursera gummfera, glass, iron oxide, santalum album, bluestone, sulfur, tar, rubber, volcanic ash, lodestones, trinitrotoluene (TNT), ammonium nitrate, and other natural and artificial ingredients suspended in microcrystalline wax and paraffin on sheet - metal base 48 1/2 x 25 3/4 x 24 3/4 inches

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.

«Scientists have discovered a layer of volcanic ash and glass shards in Antarctica, evidence of an old eruption by a still active volcano that researchers believe may be contributing to the thinning of Antarctic glacial ice.