Sentences with phrase «of volcanic glass»

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.

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.

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

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.

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

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.

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.

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.

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.

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.

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.

Not exact matches

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.

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.

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.

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.

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

«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 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.

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).

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..

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.

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.

«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.

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.

The first type of home insurance policy, HO - 1, covers 11 basic home perils: fire or lightning, windstorm or hail, explosions, riot or civil commotion, damage from aircraft, damage from vehicles, smoke damage, vandalism, theft, volcanic eruption, glass or safety - glazing material damage.

The first type of policy, HO - 1, is known as the basic home insurance policy and includes coverage of these basic perils: fire or lightning, windstorm or hail, riot or civil commotion, explosions, damage from vehicles, damage from aircraft, smoke damage, vandalism, theft, volcanic eruption, glass or safety - glazing material damage.

With the pervasiveness of smoke, volcanic ash gets everywhere, and is comprised of tiny jagged pieces of glass (pulverized lava), laced with sulphur and cyanide.

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.

The first geographical feature you'll notice is the Glass House Mountains — a collection of volcanic cores that pop up from the surrounding plain.

The tour starts with a visit to the glass factory COPAVIC where you can see the process of the blown glass (if it is open), Zunil where you visit the cooperative Santa Ana and the colonial Church and Almolonga where you can see Mayan saint «Maximon», to finish the tour you will have time to relax at Fuentes Georginas (Natural volcanic thermal water).

The rugged volcanic peaks of the Glass House Mountains are listed on the Queensland and National heritage registers as a landscape of national importance due to their cultural significance to the area's traditional Aboriginal owners, the Gubbi Gubbi people.

One of his landmark projects, Pedro y Pablo, an experimental set of glass bowls blown into volcanic stone molds — which require 99 percent less energy to make than conventionally tooled molds — is now part of the permanent collection at the Cooper Hewitt, Smithsonian Design Museum.

«Their sculptural works have a highly sensory appeal, ranging from the gleaming visual surfaces of hand - blown glass to the coarse textures of volcanic stone.

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.

(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.

«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.

The first type of home insurance policy, HO - 1, covers 11 basic home perils: fire or lightning, windstorm or hail, explosions, riot or civil commotion, damage from aircraft, damage from vehicles, smoke damage, vandalism, theft, volcanic eruption, glass or safety - glazing material damage.

HO - 1 or Basic Coverage, is the type of packaged Homeowners Insurance policy meant for protection of home, detached structures, and personal property from losses caused by the following disasters and perils: fire or lightning, wind or hail, explosion, riot or civil unrest, aircraft, vehicles, volcanic eruptions, smoke, theft, vandalism or malicious mischief and self - damaging instances (e.g. damage by glass material that is part of the building, a part of the building falling, etc).

The first type of policy, HO - 1, is known as the basic home insurance policy and includes coverage of these basic perils: fire or lightning, windstorm or hail, riot or civil commotion, explosions, damage from vehicles, damage from aircraft, smoke damage, vandalism, theft, volcanic eruption, glass or safety - glazing material damage.

Basic perils include coverage for losses resulting from fire or lightning, volcanic eruption, windstorm or hail, vehicle explosion, riot or civil commotion, aircraft, smoke, vandalism, theft, and glass breakage (when the glass is part of a building).